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Quantum information

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5498: 38: 1145:, began to be developed, making it possible to isolate single atoms and arrange them in arrays. Prior to these developments, precise control over single quantum systems was not possible, and experiments utilized coarser, simultaneous control over a large number of quantum systems. The development of viable single-state manipulation techniques led to increased interest in the field of quantum information and computation. 6290: 5488: 6592: 2784:
polarizations. This necessitates that the two distant parties have exact directionality synchronization. However, from quantum mechanics theory the quantum state is completely random so that it is impossible for Alice to predict if she will get vertical polarization or horizontal polarization results.
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quantum cryptographic protocol. The key idea was the use of the fundamental principle of quantum mechanics that observation disturbs the observed, and the introduction of an eavesdropper in a secure communication line will immediately let the two parties trying to communicate know of the presence of
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The entangled states are perfectly correlated which means that if Alice and Bob both measure their particles having either a vertical or horizontal polarization, they always get the same answer with 100% probability. The same is true if they both measure any other pair of complementary (orthogonal)
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Despite all the excitement and interest over studying isolated quantum systems and trying to find a way to circumvent the theory of relativity, research in quantum information theory became stagnant in the 1980s. However, around the same time another avenue started dabbling into quantum information
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doubles every two years. As transistors began to become smaller and smaller in order to pack more power per surface area, quantum effects started to show up in the electronics resulting in inadvertent interference. This led to the advent of quantum computing, which used quantum mechanics to design
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If a quantum system were perfectly isolated, it would maintain coherence perfectly, but it would be impossible to test the entire system. If it is not perfectly isolated, for example during a measurement, coherence is shared with the environment and appears to be lost with time; this process is
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are also applications of quantum communication. They are two opposite ways to communicate using qubits. While teleportation transfers one qubit from Alice and Bob by communicating two classical bits under the assumption that Alice and Bob have a pre-shared Bell state, dense coding transfers two
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Like the BB84, Alice transmits to Bob a string of photons encoded with randomly chosen bits but this time the bits Alice chooses the bases she must use. Bob still randomly chooses a basis by which to measure but if he chooses the wrong basis, he will not measure anything which is guaranteed by
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cannot be precisely measured simultaneously, as an eigenstate in one basis is not an eigenstate in the other basis. According to the eigenstate–eigenvalue link, an observable is well-defined (definite) when the state of the system is an eigenstate of the observable. Since any two non-commuting
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Shannon entropy is the quantification of the information gained by measuring the value of a random variable. Another way of thinking about it is by looking at the uncertainty of a system prior to measurement. As a result, entropy, as pictured by Shannon, can be seen either as a measure of the
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using matrix mechanics. The equivalence of these methods was proven later. Their formulations described the dynamics of microscopic systems but had several unsatisfactory aspects in describing measurement processes. Von Neumann formulated quantum theory using operator algebra in a way that it
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was made by Artur Ekert in 1991. His scheme uses entangled pairs of photons. These two photons can be created by Alice, Bob, or by a third party including eavesdropper Eve. One of the photons is distributed to Alice and the other to Bob so that each one ends up with one photon from the pair.
199:, or electrons spiraling into the nucleus. At first these problems were brushed aside by adding ad hoc hypotheses to classical physics. Soon, it became apparent that a new theory must be created in order to make sense of these absurdities, and the theory of quantum mechanics was born. 2747:
One of the best known applications of quantum cryptography is quantum key distribution which provide a theoretical solution to the security issue of a classical key. The advantage of quantum key distribution is that it is impossible to copy a quantum key because of the
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This definition of entropy can be used to quantify the physical resources required to store the output of an information source. The ways of interpreting Shannon entropy discussed above are usually only meaningful when the number of samples of an experiment is large.
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Classical bits can be encoded into and subsequently retrieved from configurations of qubits, through the use of quantum gates. By itself, a single qubit can convey no more than one bit of accessible classical information about its preparation. This is
1611:(QKD) allows unconditionally secure transmission of classical information, unlike classical encryption, which can always be broken in principle, if not in practice. Do note that certain subtle points regarding the safety of QKD are still hotly debated. 2904:. Quantum error correction is essential if one is to achieve fault-tolerant quantum computation that can deal not only with noise on stored quantum information, but also with faulty quantum gates, faulty quantum preparation, and faulty measurements. 806: 1626:
is the study of how microscopic physical systems change dynamically in nature. In the field of quantum information theory, the quantum systems studied are abstracted away from any real world counterpart. A qubit might for instance physically be a
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and Gordon proposed a formulation of optical communications using quantum mechanics. This was the first historical appearance of quantum information theory. They mainly studied error probabilities and channel capacities for communication. Later,
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One interpretation of Shannon entropy was the uncertainty associated with a probability distribution. When we want to describe the information or the uncertainty of a quantum state, the probability distributions are simply replaced by
2325: 1152:. If it were possible to clone an unknown quantum state, it would be possible to use entangled quantum states to transmit information faster than the speed of light, disproving Einstein's theory. However, the 2041: 2764:, was developed by Charles Bennett and Gilles Brassard in 1984. It is usually explained as a method of securely communicating a private key from a third party to another for use in one-time pad encryption. 1509:
Due to the volatility of quantum systems and the impossibility of copying states, the storing of quantum information is much more difficult than storing classical information. Nevertheless, with the use of
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Optical lattices use lasers to separate rubidium atoms (red) for use as information bits in neutral-atom quantum processors—prototype devices which designers are trying to develop into full-fledged quantum
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is one of the applications of quantum physics and quantum information. There are some famous theorems such as the no-cloning theorem that illustrate some important properties in quantum communication.
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Soon enough, the first computers were made, and computer hardware grew at such a fast pace that the growth, through experience in production, was codified into an empirical relationship called
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described measurement as well as dynamics. These studies emphasized the philosophical aspects of measurement rather than a quantitative approach to extracting information via measurements.
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problem as it was called, could be solved efficiently on a quantum computer but not on a classical computer hence showing that quantum computers are more powerful than Turing machines.
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Quantum information theory is largely an extension of classical information theory to quantum systems. Classical information is produced when measurements of quantum systems are made.
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Bennett and Brassard developed a communication channel on which it is impossible to eavesdrop without being detected, a way of communicating secretly at long distances using the
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is the technical term for the statement that quantum information within the universe is conserved. The five theorems open up possibilities in quantum information processing.
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that can factor numbers in polynomial time, compared to the best classical algorithms that take sub-exponential time. As factorization is an important part of the safety of
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Entropy measures the uncertainty in the state of a physical system. Entropy can be studied from the point of view of both the classical and quantum information theories.
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At this point, quantum computers showed promise of being much faster than classical computers for certain specific problems. One such example problem was developed by
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called quantum decoherence. As a result of this process, quantum behavior is apparently lost, just as energy appears to be lost by friction in classical mechanics.
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Quantum information theory also followed a similar trajectory, Ben Schumacher in 1995 made an analogue to Shannon's noiseless coding theorem using the
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is a generalization of Shannon entropy defined above. The RĂ©nyi entropy of order r, written as a function of a discrete probability distribution,
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quantum information can still be reliably stored in principle. The existence of quantum error correcting codes has also led to the possibility of
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observables are not simultaneously well-defined, a quantum state can never contain definitive information about both non-commuting observables.
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that tries to find encryption schemes that remain safe even when quantum computers are in play. Other examples of algorithms that demonstrate
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classical bits from Alice to Bob by using one qubit, again under the same assumption, that Alice and Bob have a pre-shared Bell state.
5025: 2752:. If someone tries to read encoded data, the quantum state being transmitted will change. This could be used to detect eavesdropping. 1694: 1447:, which prevents an arbitrary qubit from being delivered to multiple recipients, although it can be transported from place to place ( 5557: 5520: 5501: 5389: 4642: 4489: 4438: 3930: 3421: 3235: 3143: 3079: 1640: 1336: 4975: 2989: 5667: 5317: 1632: 5934: 5929: 1679:. Classical information, in principle, can be stored in a bit of binary strings. Any system having two states is a capable bit. 6225: 5652: 5312: 5040: 5020: 3685: 5909: 4819: 1177:
cryptography is the problem of doing communication or computation involving two or more parties who may not trust one another.
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Von Neumann entropy plays a role in quantum information similar to the role Shannon entropy plays in classical information.
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of the 1 and 0 states. However, when qubits are measured the result of the measurement is always either a 0 or a 1; the
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quantum mechanics theories. Bob can simply tell Alice after each bit she sends whether or not he measured it correctly.
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Unlike classical digital states (which are discrete), a qubit is continuous-valued, describable by a direction on the
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can be used to perform computations faster than in any known classical algorithm. The most famous example of this is
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showed that such cloning is impossible. The theorem was one of the earliest results of quantum information theory.
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obtained an upper bound of communication speed in the transmission of a classical message via a quantum channel.
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Quantum information, and changes in quantum information, can be quantitatively measured by using an analogue of
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has become an active research area because of the possibility to disrupt modern computation, communication, and
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Quantum Information, Computation and Cryptography: An Introductory Survey of Theory, Technology and Experiments
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uncertainty prior to making a measurement or as a measure of information gained after making said measurement.
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are described as rotations on the Bloch Sphere. While classical gates correspond to the familiar operations of
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Around the time computer science was making a revolution, so was information theory and communication, through
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The state of a qubit contains all of its information. This state is frequently expressed as a vector on the
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Any attempt at eavesdropping by Eve destroys this quantum entanglement such that Alice and Bob can detect.
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Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics
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the value precisely. Five famous theorems describe the limits on manipulation of quantum information.
521:{\displaystyle |\psi _{\rm {I}}(t)\rangle =e^{iH_{0,\mathrm {S} }~t/\hbar }|\psi _{\rm {S}}(t)\rangle } 6475: 6398: 6220: 6149: 6094: 5824: 5647: 5154: 4903: 4754: 4565: 4382: 4127: 3861: 3753: 3596: 3515: 3324: 3009: 2159: 1798: 1652: 1534: 1444: 1307: 1165: 1149: 206: 5256: 2423: 2393: 1651:. Another important difference with quantum mechanics is that while quantum mechanics often studies 1290:, in many striking and unfamiliar ways. While the fundamental unit of classical information is the 6568: 6526: 6495: 6455: 6415: 6205: 6174: 6099: 6007: 5964: 5819: 5745: 5672: 5662: 5574: 5473: 5426: 5030: 4784: 4764: 4699: 3661: 3014: 2869: 2493: 1574: 1563: 1559: 1526: 1518: 1466: 1438: 1419: 1303: 1248: 1117: 275: 66: 3071: 2661: 6460: 6350: 6134: 6032: 5740: 5687: 5579: 5189: 4837: 4774: 4614: 4589: 4467: 4398: 4372: 4181: 4143: 4072: 4054: 3887: 3834: 3769: 3726: 3562: 3488: 3462: 3157: 2857: 2749: 1578: 1432: 1414:
possible unit of quantum information, and despite the qubit state being continuous-valued, it is
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In the 1980s, interest arose in whether it might be possible to use quantum effects to disprove
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Georgiev, Danko D. (2020). "Quantum information theoretic approach to the mind-brain problem".
1847:, can be seen as the average information associated with this set of events, in units of bits: 159:. Just like the basic unit of classical information is the bit, quantum information deals with 6505: 6393: 6363: 6358: 6275: 6184: 6154: 6082: 6045: 6040: 6022: 5987: 5977: 5692: 5657: 5640: 5543: 5453: 5098: 5005: 4962: 4893: 4809: 4789: 4744: 4704: 4682: 4581: 4535: 4525: 4485: 4444: 4434: 4329: 4319: 3936: 3926: 3794: 3716: 3622: 3612: 3480: 3427: 3417: 3382: 3340: 3299: 3266: 3231: 3198: 3188: 3149: 3139: 3085: 3075: 2949: 2820: 2725: 1623: 1586: 1570: 1530: 1458: 1240: 1199: 1195: 210: 202: 192: 188: 167: 133: 125: 109: 105: 93: 73: 4608: 4313: 3319:
Hayashi, Masahito; Ishizaka, Satoshi; Kawachi, Akinori; Kimura, Gen; Ogawa, Tomohiro (2015).
2364: 660:{\displaystyle A_{\rm {H}}(t)=e^{iH_{\rm {S}}~t/\hbar }A_{\rm {S}}e^{-iH_{\rm {S}}~t/\hbar }} 6410: 6002: 5997: 5854: 5750: 5120: 5070: 4847: 4573: 4517: 4477: 4426: 4390: 4309: 4266: 4241: 4211: 4173: 4135: 4064: 4020: 3996: 3978: 3954: 3918: 3910: 3877: 3869: 3826: 3761: 3708: 3666: 3604: 3523: 3472: 3435: 3409: 3374: 3332: 3291: 3258: 3223: 3180: 3131: 3067: 3039: 2893: 2500: 2061: 2055: 1598: 1594: 1549: 1537:
qubits, can convey two bits of accessible information about their joint state to a receiver.
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The study of all of the above topics and differences comprises quantum information theory.
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Information is something physical that is encoded in the state of a quantum system. While
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Quantum Mechanics: The Theoretical Minimum. What You Need to Know to Start Doing Physics
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The history of quantum information theory began at the turn of the 20th century when
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techniques. Quantum information refers to both the technical definition in terms of
6531: 6012: 5625: 5620: 5397: 5322: 4352: 4185: 4161: 4147: 3909:. Mathematics in Science and Engineering. Vol. 123. New York: Academic Press. 3773: 2772: 1490: 1482: 1407: 1286:
Quantum information differs strongly from classical information, epitomized by the
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Perlman, H. S. (1964). "Equivalence of the Schroedinger and Heisenberg pictures".
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In the 1970s, techniques for manipulating single-atom quantum states, such as the
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Shannon entropy, written as a functional of a discrete probability distribution,
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Proceedings of the Royal Society of London A: Mathematical and Physical Sciences
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Benatti, Fabio; Fannes, Mark; Floreanini, Roberto; Petritis, Dimitri (2010).
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can also be generalized to the quantum case, such as Holevo entropy and the
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manipulates and processes information – performs logical operations – using
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Classical information is based on the concepts of information laid out by
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by storing the information of one qubit onto a highly entangled state of
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Quantum information, like classical information, can be processed using
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Gilton, Marian J. R. (2016). "Whence the eigenstate–eigenvalue link?".
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among other fields. Its study is also relevant to disciplines such as
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Helstrom, Carl W. (1969). "Quantum detection and estimation theory".
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Any quantum computation algorithm can be represented as a network of
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deals with examining properties of matter at the microscopic level,
4556:(1992). "Quantum cryptography using any two nonorthogonal states". 4059: 3817:
Gordon, J. P. (1962). "Quantum effects in communications systems".
3467: 2930:, although only a few are dedicated to this area. Among these are: 4709: 4472: 4377: 3029: 2830: 1295: 1275: 160: 36: 3608: 1410:. Despite being continuously valued in this way, a qubit is the 1243:. This problem however held little to no practical applications. 163:. Quantum information can be measured using Von Neumann entropy. 5458: 4931: 4864: 4000: 2999: 2761: 2036:{\displaystyle H(X)=H=-\sum _{i=1}^{n}P(x_{i})\log _{2}P(x_{i})} 1182: 6308: 5516: 4631: 4347:
Weedbrook, Christian; Pirandola, Stefano; GarcĂ­a-PatrĂłn, RaĂşl;
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We arrive at the definition of Shannon entropy from RĂ©nyi when
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The Feynman Lectures on Physics. Volume III. Quantum Mechanics
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that the qubits were in immediately prior to the measurement.
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This scheme relies on two properties of quantum entanglement:
1602: 1388:{\displaystyle S(\rho )=-\operatorname {Tr} (\rho \ln \rho ).} 1291: 1287: 4164:(1998). "Cramming more components onto integrated circuits". 3257:. Lecture Notes in Physics. Vol. 808. Berlin: Springer. 1461:, which demonstrates the conservation of quantum information. 132:
focuses on extracting information from those properties, and
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A Survey of the Prominent Quantum Key Distribution Protocols
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Quantum Information and Consciousness: A Gentle Introduction
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Mathematical Foundations of Quantum Mechanics: New Edition
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The most widely used model in quantum computation is the
3686:"Quantum computing: Opening new realms of possibilities" 4466:(2nd ed.). Cambridge: Cambridge University Press. 1441:, which prevents an arbitrary qubit from being deleted. 3544:
Quantum Computation (Physics 219/Computer Science 219)
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Benatti, Fabio (2009). "Quantum Information Theory".
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Lo, Hoi-Kwong; Popescu, Sandu; Spiller, Tim (1998).
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in classical computation. Qubits can be in a 1 or 0
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in 1994 came up with a very important and practical
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Introduction to Quantum Computation and Information
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Quantum Information Theory: Mathematical Foundation
4232:(1948). "A mathematical theory of communication". 4202:(1948). "A mathematical theory of communication". 3219:Philosophy of Quantum Information and Entanglement 2896:to protect quantum information from errors due to 2697: 2677: 2648: 2514: 2468: 2438: 2408: 2379: 2353: 2319: 2200: 2148: 2035: 1839: 1787: 1387: 1325: 1098: 945: 800: 659: 520: 396: 4001:"On capacity of a quantum communications channel" 1271:could be used to protect information being sent. 1190:Development from computer science and mathematics 27:Information held in the state of a quantum system 3373:. Graduate Texts in Physics. Berlin: Springer. 1395:Many of the same entropy measures in classical 151:from one location to another, manipulated with 72:It is an interdisciplinary field that involves 4414: 4412: 3126:Nielsen, Michael A.; Chuang, Isaac L. (2010). 3121: 3119: 2910:first discovered this method of formulating a 2149:{\displaystyle P(a_{1}),P(a_{2}),...,P(a_{n})} 1788:{\displaystyle P(x_{1}),P(x_{2}),...,P(x_{n})} 1133:Development from atomic physics and relativity 183:Development from fundamental quantum mechanics 6320: 5528: 4643: 4505: 4503: 4501: 3812: 3810: 3364: 3362: 3360: 3358: 3356: 3117: 3115: 3113: 3111: 3109: 3107: 3105: 3103: 3101: 3099: 1540:Quantum information can be moved about, in a 244: 8: 3455:Progress in Biophysics and Molecular Biology 2936:International Journal of Quantum Information 1581:, Shor's algorithm sparked the new field of 515: 441: 391: 320: 4259:Shannon, Claude E.; Weaver, Warren (1964). 3321:Introduction to Quantum Information Science 3128:Quantum Computation and Quantum Information 3064:Introduction to Quantum Information Science 2760:The first quantum key distribution scheme, 1302:, while the quantum mechanical analogue is 6591: 6346: 6327: 6313: 6305: 5535: 5521: 5513: 5295: 4899: 4650: 4636: 4628: 2799:The main difference between B92 and BB84: 1544:, analogous to the concept of a classical 1298:. Classical information is measured using 251: 237: 4471: 4425:. Cambridge: Cambridge University Press. 4376: 4058: 3881: 3707:. Princeton: Princeton University Press. 3660: 3584: 3582: 3466: 3222:. Cambridge: Cambridge University Press. 3072:10.1093/acprof:oso/9780199215706.001.0001 2690: 2669: 2663: 2637: 2621: 2608: 2598: 2570: 2549: 2529: 2507: 2455: 2425: 2395: 2366: 2334: 2308: 2295: 2285: 2274: 2261: 2239: 2221: 2215: 2192: 2167: 2161: 2137: 2103: 2081: 2069: 2024: 2005: 1992: 1976: 1965: 1943: 1909: 1887: 1854: 1831: 1806: 1800: 1776: 1742: 1720: 1708: 1338: 1318: 1086: 1073: 1066: 1055: 1035: 1034: 1020: 1007: 1000: 992: 969: 968: 962: 933: 920: 919: 911: 891: 890: 876: 863: 862: 851: 828: 827: 821: 788: 775: 768: 757: 746: 745: 731: 718: 711: 703: 680: 679: 673: 647: 634: 633: 622: 611: 610: 596: 583: 582: 574: 551: 550: 544: 499: 498: 489: 479: 466: 459: 451: 425: 424: 415: 413: 375: 374: 365: 355: 342: 341: 330: 304: 303: 294: 292: 155:, and analyzed with computer science and 4363:(2012). "Gaussian quantum information". 4265:. Urbana: University of Illinois Press. 4262:The Mathematical Theory of Communication 1485:. This state can be changed by applying 222: 5168:Continuous-variable quantum information 3907:Quantum Detection and Estimation Theory 3649:IEEE Transactions on Information Theory 3216:Bokulich, Alisa; Jaeger, Gregg (2010). 3051: 3000:Positive Operator Valued Measure (POVM) 1310:of quantum mechanical systems with the 1091: 1025: 938: 881: 793: 736: 652: 601: 484: 360: 4613:. Washington University in St. Louis. 3647:(1998). "Quantum information theory". 2833:". Qubit is somewhat analogous to the 2829:, which are based on the quantum bit " 1597:of problems efficiently solvable by a 57:. It is the basic entity of study in 2957:Quantum Information & Computation 7: 4005:Problems of Information Transmission 3963:Problems of Information Transmission 3177:Quantum Information: An Introduction 2995:Interpretations of quantum mechanics 2849:of these two outcomes depend on the 2469:{\displaystyle r\rightarrow \infty } 69:and the general computational term. 3066:. Oxford: Oxford University Press. 1259:Development from information theory 4246:10.1002/j.1538-7305.1948.tb00917.x 4216:10.1002/j.1538-7305.1948.tb01338.x 2926:Many journals publish research in 2796:B92 is a simpler version of BB84. 2553: 2550: 2463: 2348: 1533:a sender, by acting on one of two 1074: 1036: 1008: 970: 921: 892: 864: 829: 776: 747: 719: 681: 635: 612: 584: 552: 500: 467: 426: 376: 343: 305: 25: 4422:The Theory of Quantum Information 4234:The Bell System Technical Journal 4204:The Bell System Technical Journal 3402:Georgiev, Danko D. (2017-12-06). 2354:{\displaystyle 0<r<\infty } 6590: 6289: 6288: 5497: 5496: 5487: 5486: 4513:Quantum Information: An Overview 3787:Neumann, John von (2018-02-27). 3690:Discovery: Research at Princeton 3477:10.1016/j.pbiomolbio.2020.08.002 2806:BB84 needs 4 polarization states 1641:superconducting quantum computer 1552:, measured in qubits per second. 3705:Quantum Mechanics in a Nutshell 3595:. Singapore: World Scientific. 2201:{\displaystyle a_{1},...,a_{n}} 1840:{\displaystyle x_{1},...,x_{n}} 1695:Shannon's source coding theorem 1633:linear optical quantum computer 1465:These theorems are proven from 1150:Einstein's theory of relativity 61:, and can be manipulated using 6238:Relativistic quantum mechanics 4271:11858/00-001M-0000-002C-4314-2 3854:Journal of Statistical Physics 3793:. Princeton University Press. 2990:Einstein's thought experiments 2971:Quantum Science and Technology 2964:Quantum Information Processing 2585: 2557: 2540: 2534: 2460: 2439:{\displaystyle r\rightarrow 0} 2430: 2409:{\displaystyle r\rightarrow 1} 2400: 2314: 2301: 2233: 2227: 2143: 2130: 2109: 2096: 2087: 2074: 2030: 2017: 1998: 1985: 1952: 1949: 1936: 1915: 1902: 1893: 1880: 1874: 1865: 1859: 1782: 1769: 1748: 1735: 1726: 1713: 1477:Quantum information processing 1379: 1364: 1349: 1343: 1112:Development from communication 1048: 1042: 982: 976: 904: 898: 841: 835: 693: 687: 564: 558: 512: 506: 490: 438: 432: 416: 388: 382: 366: 317: 311: 295: 138:quantum information processing 63:quantum information processing 1: 6216:Quantum statistical mechanics 5993:Quantum differential calculus 5915:Delayed-choice quantum eraser 5698:Symmetry in quantum mechanics 5163:Adiabatic quantum computation 3915:10.1016/s0076-5392(08)x6017-5 3025:Quantum statistical mechanics 2985:Categorical quantum mechanics 2912:quantum error correcting code 1619:Relation to quantum mechanics 1501:, quantum gates are physical 1282:Qubits and information theory 1160:Development from cryptography 1143:scanning tunneling microscope 5214:Topological quantum computer 4047:Theoretical Computer Science 3569:(2013). "Quantum behavior". 2678:{\displaystyle \lambda _{i}} 1689:Entropy (information theory) 1671:Classical information theory 1637:trapped ion quantum computer 6018:Quantum stochastic calculus 6008:Quantum measurement problem 5930:Mach–Zehnder interferometer 5492:Quantum information science 4659:Quantum information science 4578:10.1103/PhysRevLett.68.3121 3528:10.1016/j.shpsb.2016.08.005 3296:10.1007/978-1-4020-9306-7_6 3020:Quantum information science 2928:quantum information science 1401:conditional quantum entropy 130:quantum information science 6635: 6619:Quantum information theory 6574:Thermoacoustic heat engine 4887:quantum gate teleportation 4464:Quantum Information Theory 3905:Helstrom, Carl W. (1976). 3831:10.1109/jrproc.1962.288169 3684:Garlinghouse, Tom (2020). 3369:Hayashi, Masahito (2017). 3175:Hayashi, Masahito (2006). 2882: 2867: 2818: 2740: 2491: 2480:Quantum information theory 2053: 1692: 1686: 1193: 1163: 59:quantum information theory 49:is the information of the 29: 6586: 6559:Immersive virtual reality 6284: 6078:Quantum complexity theory 6056:Quantum cellular automata 5761:Path integral formulation 5482: 5016:Quantum Fourier transform 4912:Post-quantum cryptography 4855:Entanglement distillation 4522:10.1007/978-0-387-36944-0 4395:10.1103/RevModPhys.84.621 4365:Reviews of Modern Physics 4318:. New York: Basic Books. 4178:10.1109/jproc.1998.658762 4069:10.1016/j.tcs.2014.05.025 3703:Mahan, Gerald D. (2009). 3563:Leighton, Robert Benjamin 3559:Feynman, Richard Phillips 3408:. Boca Raton: CRC Press. 3379:10.1007/978-3-662-49725-8 3337:10.1007/978-3-662-43502-1 3263:10.1007/978-3-642-11914-9 2803:B92 only needs two states 2156:, associated with events 1591:Grover's search algorithm 1583:post-quantum cryptography 228: 225: 209:using wave mechanics and 6542:Digital scent technology 6145:Quantum machine learning 6125:Quantum key distribution 6115:Quantum image processing 6105:Quantum error correction 5955:Wheeler's delayed choice 5502:Quantum mechanics topics 5197:Quantum machine learning 5173:One-way quantum computer 5026:Quantum phase estimation 4927:Quantum key distribution 4860:Monogamy of entanglement 4312:; Friedman, Art (2014). 3228:10.1017/CBO9780511676550 3136:10.1017/cbo9780511976667 2885:Quantum error correction 2879:Quantum error correction 2743:Quantum key distribution 2737:Quantum key distribution 1609:Quantum key distribution 1512:quantum error correction 1427:no-teleportation theorem 191:was revolutionized into 6061:Quantum finite automata 5109:Randomized benchmarking 4971:Amplitude amplification 4607:Haitjema, Mart (2007). 4558:Physical Review Letters 4462:Wilde, Mark M. (2017). 4166:Proceedings of the IEEE 2943:npj Quantum Information 2685:are the eigenvalues of 2380:{\displaystyle r\neq 1} 1795:associated with events 1663:Entropy and information 1495:unitary transformations 1241:Deutsch–Jozsa algorithm 197:ultraviolet catastrophe 178:History and development 166:Recently, the field of 32:npj Quantum Information 6564:Magnetic refrigeration 6165:Quantum neural network 5209:Quantum Turing machine 5202:quantum neural network 4949:Quantum secret sharing 4516:. New York: Springer. 4510:Jaeger, Gregg (2007). 4419:Watrous, John (2018). 4140:10.1098/rspa.1985.0070 4092:"Church–Turing Thesis" 3819:Proceedings of the IRE 2841:, or they can be in a 2699: 2679: 2650: 2516: 2470: 2440: 2420:(or max-entropy) when 2410: 2381: 2355: 2321: 2290: 2202: 2150: 2037: 1981: 1841: 1789: 1546:communications channel 1487:linear transformations 1389: 1327: 1269:error correcting codes 1175:. In a general sense, 1100: 947: 802: 661: 522: 398: 43: 6537:Cloak of invisibility 6336:Emerging technologies 6190:Quantum teleportation 5718:Wave–particle duality 5281:Entanglement-assisted 5242:quantum convolutional 4917:Quantum coin flipping 4882:Quantum teleportation 4843:entanglement-assisted 4673:DiVincenzo's criteria 4482:10.1017/9781316809976 4431:10.1017/9781316848142 4096:mathworld.wolfram.com 3645:Shor, Peter Williston 3567:Sands, Matthew Linzee 3414:10.1201/9780203732519 3185:10.1007/3-540-30266-2 2730:quantum teleportation 2722:Quantum communication 2717:Quantum communication 2700: 2698:{\displaystyle \rho } 2680: 2651: 2517: 2515:{\displaystyle \rho } 2471: 2441: 2411: 2382: 2356: 2322: 2270: 2203: 2151: 2038: 1961: 1842: 1790: 1469:, which according to 1453:quantum teleportation 1390: 1328: 1326:{\displaystyle \rho } 1101: 948: 803: 662: 523: 399: 114:uncertainty principle 40: 30:For the journal, see 6221:Quantum field theory 6150:Quantum metamaterial 6095:Quantum cryptography 5825:Consistent histories 5092:processor benchmarks 5021:Quantum optimization 4904:Quantum cryptography 4715:physical vs. logical 4285:"Alexandr S. Holevo" 3997:Holevo, Alexander S. 3955:Holevo, Alexander S. 3323:. Berlin: Springer. 3179:. Berlin: Springer. 3010:Quantum entanglement 2689: 2662: 2528: 2506: 2454: 2424: 2394: 2365: 2333: 2214: 2160: 2068: 1853: 1799: 1707: 1653:infinite-dimensional 1445:no-broadcast theorem 1337: 1317: 1308:statistical ensemble 1214:Church–Turing thesis 1166:Quantum cryptography 961: 820: 672: 543: 412: 291: 6569:Phased-array optics 6527:Acoustic levitation 6206:Quantum fluctuation 6175:Quantum programming 6135:Quantum logic gates 6120:Quantum information 6100:Quantum electronics 5575:Classical mechanics 4805:Quantum speed limit 4700:Quantum programming 4695:Quantum information 4570:1992PhRvL..68.3121B 4554:Bennett, Charles H. 4387:2012RvMP...84..621W 4357:Shapiro, Jeffrey H. 4162:Moore, Gordon Earle 4132:1985RSPSA.400...97D 4090:Weisstein, Eric W. 4039:Bennett, Charles H. 3866:1969JSP.....1..231H 3758:1964Natur.204..771P 3641:Bennett, Charles H. 3601:1998iqci.book.....S 3520:2016SHPMP..55...92G 3329:2015iqis.book.....H 3015:Quantum foundations 2870:Quantum decoherence 2864:Quantum decoherence 2858:quantum logic gates 2815:Quantum computation 2494:Von Neumann entropy 2488:Von Neumann entropy 1657:harmonic oscillator 1564:von Neumann entropy 1519:quantum computation 1439:no-deleting theorem 1304:Von Neumann entropy 1204:With the advent of 134:quantum computation 67:Von Neumann entropy 47:Quantum information 18:Quantum Information 6259:in popular culture 6041:Quantum algorithms 5889:Von Neumann–Wigner 5869:Objective collapse 5580:Old quantum theory 5454:Forest/Rigetti QCS 5190:quantum logic gate 4976:Bernstein–Vazirani 4963:Quantum algorithms 4838:Classical capacity 4722:Quantum processors 4705:Quantum simulation 4230:Shannon, Claude E. 4200:Shannon, Claude E. 3874:10.1007/bf01007479 3713:10.2307/j.ctt7s8nw 2750:no-cloning theorem 2695: 2675: 2646: 2603: 2512: 2466: 2436: 2406: 2377: 2351: 2317: 2198: 2146: 2033: 1837: 1785: 1655:systems such as a 1571:quantum algorithms 1433:no-cloning theorem 1397:information theory 1385: 1323: 1253:discrete logarithm 1225:integrated circuit 1186:the eavesdropper. 1154:no-cloning theorem 1096: 943: 798: 657: 518: 394: 219:Dynamical Pictures 205:was formulated by 82:information theory 44: 6606: 6605: 6582: 6581: 6389:complexity theory 6374:cellular automata 6302: 6301: 6276:Quantum mysticism 6254:Schrödinger's cat 6185:Quantum simulator 6155:Quantum metrology 6083:Quantum computing 6046:Quantum amplifier 6023:Quantum spacetime 5988:Quantum cosmology 5978:Quantum chemistry 5693:Scattering theory 5641:Zero-point energy 5636:Degenerate levels 5544:Quantum mechanics 5510: 5509: 5421: 5420: 5318:Linear optical QC 5099:Quantum supremacy 5053:complexity theory 5006:Quantum annealing 4957: 4956: 4894:Superdense coding 4683:Quantum computing 4564:(21): 3121–3124. 4531:978-0-387-36944-0 4353:Ralph, Timothy C. 4325:978-0-465-08061-8 4310:Susskind, Leonard 3800:978-0-691-17856-1 3752:(4960): 771–772. 3722:978-1-4008-3338-2 3671:10.1109/18.720553 3618:978-981-4496-35-3 3388:978-3-662-49725-8 3346:978-3-662-43502-1 3305:978-1-4020-9306-7 3288:Quantum Entropies 3272:978-3-642-11914-9 3194:978-3-540-30266-7 2894:quantum computing 2821:Quantum computing 2632: 2616: 2594: 2581: 2565: 2501:density operators 2255: 2208:, is defined as: 1624:Quantum mechanics 1587:quantum supremacy 1531:superdense coding 1503:unitary operators 1459:no-hiding theorem 1333:, it is given by 1200:Quantum algorithm 1196:Quantum supremacy 1171:and computation: 1109: 1108: 1082: 1016: 929: 872: 784: 727: 643: 592: 475: 351: 203:Quantum mechanics 189:classical physics 168:quantum computing 145:digital computers 126:quantum mechanics 110:quantum mechanics 106:scientific method 94:cognitive science 74:quantum mechanics 16:(Redirected from 6626: 6594: 6593: 6471:machine learning 6446:key distribution 6431:image processing 6421:error correction 6347: 6329: 6322: 6315: 6306: 6292: 6291: 6003:Quantum geometry 5998:Quantum dynamics 5855:Superdeterminism 5751:Matrix mechanics 5606:Bra–ket notation 5537: 5530: 5523: 5514: 5500: 5499: 5490: 5489: 5296: 5226:error correction 5155:computing models 5121:Relaxation times 5011:Quantum counting 4900: 4848:quantum capacity 4795:No-teleportation 4780:No-communication 4652: 4645: 4638: 4629: 4623: 4622: 4604: 4598: 4597: 4550: 4544: 4543: 4507: 4496: 4495: 4475: 4459: 4453: 4452: 4416: 4407: 4406: 4380: 4349:Cerf, Nicolas J. 4344: 4338: 4337: 4306: 4300: 4299: 4297: 4295: 4281: 4275: 4274: 4256: 4250: 4249: 4226: 4220: 4219: 4196: 4190: 4189: 4158: 4152: 4151: 4126:(1818): 97–117. 4112: 4106: 4105: 4103: 4102: 4087: 4081: 4080: 4062: 4043:Brassard, Gilles 4035: 4029: 4028: 3993: 3987: 3986: 3951: 3945: 3944: 3923:2060/19690016211 3902: 3896: 3895: 3885: 3883:2060/19690016211 3849: 3843: 3842: 3825:(9): 1898–1908. 3814: 3805: 3804: 3784: 3778: 3777: 3766:10.1038/204771b0 3741: 3735: 3734: 3700: 3694: 3693: 3681: 3675: 3674: 3664: 3655:(6): 2724–2742. 3637: 3631: 3630: 3586: 3577: 3576: 3555: 3549: 3548: 3541:Preskill, John. 3538: 3532: 3531: 3503: 3497: 3496: 3470: 3450: 3444: 3443: 3399: 3393: 3392: 3366: 3351: 3350: 3316: 3310: 3309: 3283: 3277: 3276: 3248: 3242: 3241: 3213: 3207: 3206: 3172: 3166: 3165: 3123: 3094: 3093: 3056: 3040:Typical subspace 2704: 2702: 2701: 2696: 2684: 2682: 2681: 2676: 2674: 2673: 2655: 2653: 2652: 2647: 2642: 2641: 2630: 2626: 2625: 2614: 2613: 2612: 2602: 2579: 2575: 2574: 2563: 2556: 2521: 2519: 2518: 2513: 2475: 2473: 2472: 2467: 2445: 2443: 2442: 2437: 2415: 2413: 2412: 2407: 2386: 2384: 2383: 2378: 2360: 2358: 2357: 2352: 2326: 2324: 2323: 2318: 2313: 2312: 2300: 2299: 2289: 2284: 2266: 2265: 2256: 2254: 2240: 2226: 2225: 2207: 2205: 2204: 2199: 2197: 2196: 2172: 2171: 2155: 2153: 2152: 2147: 2142: 2141: 2108: 2107: 2086: 2085: 2042: 2040: 2039: 2034: 2029: 2028: 2010: 2009: 1997: 1996: 1980: 1975: 1948: 1947: 1914: 1913: 1892: 1891: 1846: 1844: 1843: 1838: 1836: 1835: 1811: 1810: 1794: 1792: 1791: 1786: 1781: 1780: 1747: 1746: 1725: 1724: 1645:density matrices 1599:quantum computer 1595:complexity class 1575:Shor's algorithm 1550:channel capacity 1527:Holevo's theorem 1471:Leonard Susskind 1394: 1392: 1391: 1386: 1332: 1330: 1329: 1324: 1127:Alexander Holevo 1105: 1103: 1102: 1097: 1095: 1094: 1090: 1080: 1079: 1078: 1077: 1041: 1040: 1039: 1029: 1028: 1024: 1014: 1013: 1012: 1011: 975: 974: 973: 952: 950: 949: 944: 942: 941: 937: 927: 926: 925: 924: 897: 896: 895: 885: 884: 880: 870: 869: 868: 867: 834: 833: 832: 807: 805: 804: 799: 797: 796: 792: 782: 781: 780: 779: 752: 751: 750: 740: 739: 735: 725: 724: 723: 722: 686: 685: 684: 666: 664: 663: 658: 656: 655: 651: 641: 640: 639: 638: 617: 616: 615: 605: 604: 600: 590: 589: 588: 587: 557: 556: 555: 527: 525: 524: 519: 505: 504: 503: 493: 488: 487: 483: 473: 472: 471: 470: 431: 430: 429: 419: 403: 401: 400: 395: 381: 380: 379: 369: 364: 363: 359: 349: 348: 347: 346: 310: 309: 308: 298: 253: 246: 239: 223: 116:, non-commuting 78:computer science 21: 6634: 6633: 6629: 6628: 6627: 6625: 6624: 6623: 6609: 6608: 6607: 6602: 6578: 6515: 6426:finite automata 6338: 6333: 6303: 6298: 6280: 6266:Wigner's friend 6242: 6233:Quantum gravity 6194: 6180:Quantum sensing 6160:Quantum network 6140:Quantum machine 6110:Quantum imaging 6073:Quantum circuit 6068:Quantum channel 6027: 5973:Quantum biology 5959: 5935:Elitzur–Vaidman 5910:Davisson–Germer 5893: 5845:Hidden-variable 5835:de Broglie–Bohm 5812:Interpretations 5806: 5770: 5724: 5611:Complementarity 5589: 5546: 5541: 5511: 5506: 5478: 5428: 5417: 5390:Superconducting 5384: 5350: 5341:Neutral atom QC 5333:Ultracold atoms 5327: 5292:implementations 5291: 5285: 5225: 5218: 5185:Quantum circuit 5153: 5147: 5141: 5131: 5091: 5085: 5052: 5045: 5001:Hidden subgroup 4953: 4942:other protocols 4898: 4875:quantum network 4870:Quantum channel 4830: 4824: 4770:No-broadcasting 4760:Gottesman–Knill 4733: 4661: 4656: 4626: 4606: 4605: 4601: 4552: 4551: 4547: 4532: 4509: 4508: 4499: 4492: 4461: 4460: 4456: 4441: 4418: 4417: 4410: 4346: 4345: 4341: 4326: 4308: 4307: 4303: 4293: 4291: 4283: 4282: 4278: 4258: 4257: 4253: 4228: 4227: 4223: 4198: 4197: 4193: 4160: 4159: 4155: 4114: 4113: 4109: 4100: 4098: 4089: 4088: 4084: 4037: 4036: 4032: 3995: 3994: 3990: 3953: 3952: 3948: 3933: 3904: 3903: 3899: 3851: 3850: 3846: 3816: 3815: 3808: 3801: 3786: 3785: 3781: 3743: 3742: 3738: 3723: 3702: 3701: 3697: 3683: 3682: 3678: 3639: 3638: 3634: 3619: 3588: 3587: 3580: 3557: 3556: 3552: 3540: 3539: 3535: 3505: 3504: 3500: 3452: 3451: 3447: 3424: 3401: 3400: 3396: 3389: 3368: 3367: 3354: 3347: 3318: 3317: 3313: 3306: 3285: 3284: 3280: 3273: 3250: 3249: 3245: 3238: 3215: 3214: 3210: 3195: 3174: 3173: 3169: 3146: 3125: 3124: 3097: 3082: 3058: 3057: 3053: 3049: 3044: 2980: 2924: 2887: 2881: 2872: 2866: 2827:quantum circuit 2823: 2817: 2794: 2770: 2758: 2745: 2739: 2719: 2714: 2687: 2686: 2665: 2660: 2659: 2633: 2617: 2604: 2566: 2526: 2525: 2504: 2503: 2496: 2490: 2482: 2452: 2451: 2422: 2421: 2418:Hartley entropy 2392: 2391: 2363: 2362: 2331: 2330: 2304: 2291: 2257: 2244: 2217: 2212: 2211: 2188: 2163: 2158: 2157: 2133: 2099: 2077: 2066: 2065: 2058: 2052: 2020: 2001: 1988: 1939: 1905: 1883: 1851: 1850: 1827: 1802: 1797: 1796: 1772: 1738: 1716: 1705: 1704: 1697: 1691: 1685: 1683:Shannon entropy 1673: 1665: 1649:complex numbers 1621: 1569:In some cases, 1542:quantum channel 1529:. However, in 1493:to them. These 1479: 1335: 1334: 1315: 1314: 1300:Shannon entropy 1284: 1261: 1239:, known as the 1202: 1192: 1168: 1162: 1135: 1114: 1062: 1051: 1030: 996: 988: 964: 959: 958: 915: 907: 886: 858: 847: 823: 818: 817: 764: 753: 741: 707: 699: 675: 670: 669: 629: 618: 606: 578: 570: 546: 541: 540: 494: 455: 447: 420: 410: 409: 370: 337: 326: 299: 289: 288: 257: 193:quantum physics 185: 180: 35: 28: 23: 22: 15: 12: 11: 5: 6632: 6630: 6622: 6621: 6611: 6610: 6604: 6603: 6601: 6600: 6587: 6584: 6583: 6580: 6579: 6577: 6576: 6571: 6566: 6561: 6556: 6555: 6554: 6544: 6539: 6534: 6529: 6523: 6521: 6517: 6516: 6514: 6513: 6508: 6503: 6498: 6493: 6488: 6486:neural network 6483: 6478: 6473: 6468: 6463: 6458: 6453: 6448: 6443: 6438: 6433: 6428: 6423: 6418: 6413: 6408: 6407: 6406: 6396: 6391: 6386: 6381: 6376: 6371: 6366: 6361: 6355: 6353: 6344: 6340: 6339: 6334: 6332: 6331: 6324: 6317: 6309: 6300: 6299: 6297: 6296: 6285: 6282: 6281: 6279: 6278: 6273: 6268: 6263: 6262: 6261: 6250: 6248: 6244: 6243: 6241: 6240: 6235: 6230: 6229: 6228: 6218: 6213: 6211:Casimir effect 6208: 6202: 6200: 6196: 6195: 6193: 6192: 6187: 6182: 6177: 6172: 6170:Quantum optics 6167: 6162: 6157: 6152: 6147: 6142: 6137: 6132: 6127: 6122: 6117: 6112: 6107: 6102: 6097: 6092: 6091: 6090: 6080: 6075: 6070: 6065: 6064: 6063: 6053: 6048: 6043: 6037: 6035: 6029: 6028: 6026: 6025: 6020: 6015: 6010: 6005: 6000: 5995: 5990: 5985: 5980: 5975: 5969: 5967: 5961: 5960: 5958: 5957: 5952: 5947: 5945:Quantum eraser 5942: 5937: 5932: 5927: 5922: 5917: 5912: 5907: 5901: 5899: 5895: 5894: 5892: 5891: 5886: 5881: 5876: 5871: 5866: 5861: 5860: 5859: 5858: 5857: 5842: 5837: 5832: 5827: 5822: 5816: 5814: 5808: 5807: 5805: 5804: 5799: 5794: 5789: 5784: 5778: 5776: 5772: 5771: 5769: 5768: 5763: 5758: 5753: 5748: 5743: 5738: 5732: 5730: 5726: 5725: 5723: 5722: 5721: 5720: 5715: 5705: 5700: 5695: 5690: 5685: 5680: 5675: 5670: 5665: 5660: 5655: 5650: 5645: 5644: 5643: 5638: 5633: 5628: 5618: 5616:Density matrix 5613: 5608: 5603: 5597: 5595: 5591: 5590: 5588: 5587: 5582: 5577: 5572: 5571: 5570: 5560: 5554: 5552: 5548: 5547: 5542: 5540: 5539: 5532: 5525: 5517: 5508: 5507: 5505: 5504: 5494: 5483: 5480: 5479: 5477: 5476: 5474:many others... 5471: 5466: 5461: 5456: 5447: 5433: 5431: 5423: 5422: 5419: 5418: 5416: 5415: 5410: 5405: 5400: 5394: 5392: 5386: 5385: 5383: 5382: 5377: 5372: 5367: 5361: 5359: 5352: 5351: 5349: 5348: 5346:Trapped-ion QC 5343: 5337: 5335: 5329: 5328: 5326: 5325: 5320: 5315: 5310: 5304: 5302: 5300:Quantum optics 5293: 5287: 5286: 5284: 5283: 5278: 5277: 5276: 5269: 5264: 5259: 5254: 5249: 5244: 5239: 5230: 5228: 5220: 5219: 5217: 5216: 5211: 5206: 5205: 5204: 5194: 5193: 5192: 5182: 5181: 5180: 5170: 5165: 5159: 5157: 5149: 5148: 5146: 5145: 5144: 5143: 5139: 5133: 5129: 5118: 5117: 5116: 5106: 5104:Quantum volume 5101: 5095: 5093: 5087: 5086: 5084: 5083: 5078: 5073: 5068: 5063: 5057: 5055: 5047: 5046: 5044: 5043: 5038: 5033: 5028: 5023: 5018: 5013: 5008: 5003: 4998: 4993: 4988: 4983: 4981:Boson sampling 4978: 4973: 4967: 4965: 4959: 4958: 4955: 4954: 4952: 4951: 4946: 4945: 4944: 4939: 4934: 4924: 4919: 4914: 4908: 4906: 4897: 4896: 4891: 4890: 4889: 4879: 4878: 4877: 4867: 4862: 4857: 4852: 4851: 4850: 4845: 4834: 4832: 4826: 4825: 4823: 4822: 4817: 4815:Solovay–Kitaev 4812: 4807: 4802: 4797: 4792: 4787: 4782: 4777: 4772: 4767: 4762: 4757: 4752: 4747: 4741: 4739: 4735: 4734: 4732: 4731: 4730: 4729: 4719: 4718: 4717: 4707: 4702: 4697: 4692: 4691: 4690: 4680: 4675: 4669: 4667: 4663: 4662: 4657: 4655: 4654: 4647: 4640: 4632: 4625: 4624: 4599: 4545: 4530: 4497: 4490: 4454: 4439: 4408: 4371:(2): 621–669. 4339: 4324: 4301: 4276: 4251: 4240:(4): 623–656. 4221: 4210:(3): 379–423. 4191: 4153: 4116:Deutsch, David 4107: 4082: 4030: 4011:(4): 247–253. 3988: 3969:(3): 177–183. 3946: 3931: 3897: 3860:(2): 231–252. 3844: 3806: 3799: 3779: 3736: 3721: 3695: 3676: 3662:10.1.1.89.1572 3632: 3617: 3578: 3550: 3533: 3498: 3445: 3422: 3394: 3387: 3352: 3345: 3311: 3304: 3278: 3271: 3243: 3236: 3208: 3193: 3167: 3144: 3095: 3080: 3060:Vedral, Vlatko 3050: 3048: 3045: 3043: 3042: 3037: 3032: 3027: 3022: 3017: 3012: 3007: 3002: 2997: 2992: 2987: 2981: 2979: 2976: 2975: 2974: 2967: 2960: 2953: 2946: 2939: 2923: 2920: 2916:ancilla qubits 2883:Main article: 2880: 2877: 2868:Main article: 2865: 2862: 2819:Main article: 2816: 2813: 2808: 2807: 2804: 2793: 2790: 2789: 2788: 2785: 2769: 2766: 2757: 2754: 2741:Main article: 2738: 2735: 2718: 2715: 2713: 2710: 2694: 2672: 2668: 2645: 2640: 2636: 2629: 2624: 2620: 2611: 2607: 2601: 2597: 2593: 2590: 2587: 2584: 2578: 2573: 2569: 2562: 2559: 2555: 2552: 2548: 2545: 2542: 2539: 2536: 2533: 2511: 2492:Main article: 2489: 2486: 2481: 2478: 2465: 2462: 2459: 2435: 2432: 2429: 2405: 2402: 2399: 2376: 2373: 2370: 2350: 2347: 2344: 2341: 2338: 2316: 2311: 2307: 2303: 2298: 2294: 2288: 2283: 2280: 2277: 2273: 2269: 2264: 2260: 2253: 2250: 2247: 2243: 2238: 2235: 2232: 2229: 2224: 2220: 2195: 2191: 2187: 2184: 2181: 2178: 2175: 2170: 2166: 2145: 2140: 2136: 2132: 2129: 2126: 2123: 2120: 2117: 2114: 2111: 2106: 2102: 2098: 2095: 2092: 2089: 2084: 2080: 2076: 2073: 2054:Main article: 2051: 2048: 2032: 2027: 2023: 2019: 2016: 2013: 2008: 2004: 2000: 1995: 1991: 1987: 1984: 1979: 1974: 1971: 1968: 1964: 1960: 1957: 1954: 1951: 1946: 1942: 1938: 1935: 1932: 1929: 1926: 1923: 1920: 1917: 1912: 1908: 1904: 1901: 1898: 1895: 1890: 1886: 1882: 1879: 1876: 1873: 1870: 1867: 1864: 1861: 1858: 1834: 1830: 1826: 1823: 1820: 1817: 1814: 1809: 1805: 1784: 1779: 1775: 1771: 1768: 1765: 1762: 1759: 1756: 1753: 1750: 1745: 1741: 1737: 1734: 1731: 1728: 1723: 1719: 1715: 1712: 1687:Main article: 1684: 1681: 1677:Claude Shannon 1672: 1669: 1664: 1661: 1635:, an ion in a 1620: 1617: 1613: 1612: 1606: 1579:RSA encryption 1567: 1553: 1538: 1522: 1516:fault-tolerant 1478: 1475: 1463: 1462: 1456: 1442: 1436: 1430: 1384: 1381: 1378: 1375: 1372: 1369: 1366: 1363: 1360: 1357: 1354: 1351: 1348: 1345: 1342: 1322: 1312:density matrix 1283: 1280: 1265:Claude Shannon 1260: 1257: 1210:Turing machine 1191: 1188: 1161: 1158: 1134: 1131: 1113: 1110: 1107: 1106: 1093: 1089: 1085: 1076: 1072: 1069: 1065: 1061: 1058: 1054: 1050: 1047: 1044: 1038: 1033: 1027: 1023: 1019: 1010: 1006: 1003: 999: 995: 991: 987: 984: 981: 978: 972: 967: 956: 953: 940: 936: 932: 923: 918: 914: 910: 906: 903: 900: 894: 889: 883: 879: 875: 866: 861: 857: 854: 850: 846: 843: 840: 837: 831: 826: 815: 813:Density matrix 809: 808: 795: 791: 787: 778: 774: 771: 767: 763: 760: 756: 749: 744: 738: 734: 730: 721: 717: 714: 710: 706: 702: 698: 695: 692: 689: 683: 678: 667: 654: 650: 646: 637: 632: 628: 625: 621: 614: 609: 603: 599: 595: 586: 581: 577: 573: 569: 566: 563: 560: 554: 549: 538: 535: 529: 528: 517: 514: 511: 508: 502: 497: 492: 486: 482: 478: 469: 465: 462: 458: 454: 450: 446: 443: 440: 437: 434: 428: 423: 418: 407: 404: 393: 390: 387: 384: 378: 373: 368: 362: 358: 354: 345: 340: 336: 333: 329: 325: 322: 319: 316: 313: 307: 302: 297: 286: 280: 279: 273: 267: 260: 259: 256: 255: 248: 241: 233: 227: 226:Evolution of: 184: 181: 179: 176: 55:quantum system 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 6631: 6620: 6617: 6616: 6614: 6599: 6598: 6589: 6588: 6585: 6575: 6572: 6570: 6567: 6565: 6562: 6560: 6557: 6553: 6552:Plasma window 6550: 6549: 6548: 6545: 6543: 6540: 6538: 6535: 6533: 6530: 6528: 6525: 6524: 6522: 6518: 6512: 6511:teleportation 6509: 6507: 6504: 6502: 6499: 6497: 6494: 6492: 6489: 6487: 6484: 6482: 6479: 6477: 6474: 6472: 6469: 6467: 6464: 6462: 6459: 6457: 6454: 6452: 6449: 6447: 6444: 6442: 6439: 6437: 6434: 6432: 6429: 6427: 6424: 6422: 6419: 6417: 6414: 6412: 6409: 6405: 6402: 6401: 6400: 6397: 6395: 6392: 6390: 6387: 6385: 6382: 6380: 6377: 6375: 6372: 6370: 6367: 6365: 6362: 6360: 6357: 6356: 6354: 6352: 6348: 6345: 6341: 6337: 6330: 6325: 6323: 6318: 6316: 6311: 6310: 6307: 6295: 6287: 6286: 6283: 6277: 6274: 6272: 6269: 6267: 6264: 6260: 6257: 6256: 6255: 6252: 6251: 6249: 6245: 6239: 6236: 6234: 6231: 6227: 6224: 6223: 6222: 6219: 6217: 6214: 6212: 6209: 6207: 6204: 6203: 6201: 6197: 6191: 6188: 6186: 6183: 6181: 6178: 6176: 6173: 6171: 6168: 6166: 6163: 6161: 6158: 6156: 6153: 6151: 6148: 6146: 6143: 6141: 6138: 6136: 6133: 6131: 6130:Quantum logic 6128: 6126: 6123: 6121: 6118: 6116: 6113: 6111: 6108: 6106: 6103: 6101: 6098: 6096: 6093: 6089: 6086: 6085: 6084: 6081: 6079: 6076: 6074: 6071: 6069: 6066: 6062: 6059: 6058: 6057: 6054: 6052: 6049: 6047: 6044: 6042: 6039: 6038: 6036: 6034: 6030: 6024: 6021: 6019: 6016: 6014: 6011: 6009: 6006: 6004: 6001: 5999: 5996: 5994: 5991: 5989: 5986: 5984: 5983:Quantum chaos 5981: 5979: 5976: 5974: 5971: 5970: 5968: 5966: 5962: 5956: 5953: 5951: 5950:Stern–Gerlach 5948: 5946: 5943: 5941: 5938: 5936: 5933: 5931: 5928: 5926: 5923: 5921: 5918: 5916: 5913: 5911: 5908: 5906: 5903: 5902: 5900: 5896: 5890: 5887: 5885: 5884:Transactional 5882: 5880: 5877: 5875: 5874:Quantum logic 5872: 5870: 5867: 5865: 5862: 5856: 5853: 5852: 5851: 5848: 5847: 5846: 5843: 5841: 5838: 5836: 5833: 5831: 5828: 5826: 5823: 5821: 5818: 5817: 5815: 5813: 5809: 5803: 5800: 5798: 5795: 5793: 5790: 5788: 5785: 5783: 5780: 5779: 5777: 5773: 5767: 5764: 5762: 5759: 5757: 5754: 5752: 5749: 5747: 5744: 5742: 5739: 5737: 5734: 5733: 5731: 5727: 5719: 5716: 5714: 5711: 5710: 5709: 5708:Wave function 5706: 5704: 5701: 5699: 5696: 5694: 5691: 5689: 5686: 5684: 5683:Superposition 5681: 5679: 5678:Quantum state 5676: 5674: 5671: 5669: 5666: 5664: 5661: 5659: 5656: 5654: 5651: 5649: 5646: 5642: 5639: 5637: 5634: 5632: 5631:Excited state 5629: 5627: 5624: 5623: 5622: 5619: 5617: 5614: 5612: 5609: 5607: 5604: 5602: 5599: 5598: 5596: 5592: 5586: 5583: 5581: 5578: 5576: 5573: 5569: 5566: 5565: 5564: 5561: 5559: 5556: 5555: 5553: 5549: 5545: 5538: 5533: 5531: 5526: 5524: 5519: 5518: 5515: 5503: 5495: 5493: 5485: 5484: 5481: 5475: 5472: 5470: 5467: 5465: 5462: 5460: 5457: 5455: 5451: 5448: 5446: 5442: 5438: 5435: 5434: 5432: 5430: 5424: 5414: 5411: 5409: 5406: 5404: 5401: 5399: 5396: 5395: 5393: 5391: 5387: 5381: 5378: 5376: 5373: 5371: 5370:Spin qubit QC 5368: 5366: 5363: 5362: 5360: 5357: 5353: 5347: 5344: 5342: 5339: 5338: 5336: 5334: 5330: 5324: 5321: 5319: 5316: 5314: 5311: 5309: 5306: 5305: 5303: 5301: 5297: 5294: 5288: 5282: 5279: 5275: 5274: 5270: 5268: 5265: 5263: 5260: 5258: 5255: 5253: 5250: 5248: 5245: 5243: 5240: 5238: 5235: 5234: 5232: 5231: 5229: 5227: 5221: 5215: 5212: 5210: 5207: 5203: 5200: 5199: 5198: 5195: 5191: 5188: 5187: 5186: 5183: 5179: 5178:cluster state 5176: 5175: 5174: 5171: 5169: 5166: 5164: 5161: 5160: 5158: 5156: 5150: 5142: 5138: 5134: 5132: 5128: 5124: 5123: 5122: 5119: 5115: 5112: 5111: 5110: 5107: 5105: 5102: 5100: 5097: 5096: 5094: 5088: 5082: 5079: 5077: 5074: 5072: 5069: 5067: 5064: 5062: 5059: 5058: 5056: 5054: 5048: 5042: 5039: 5037: 5034: 5032: 5029: 5027: 5024: 5022: 5019: 5017: 5014: 5012: 5009: 5007: 5004: 5002: 4999: 4997: 4994: 4992: 4989: 4987: 4986:Deutsch–Jozsa 4984: 4982: 4979: 4977: 4974: 4972: 4969: 4968: 4966: 4964: 4960: 4950: 4947: 4943: 4940: 4938: 4935: 4933: 4930: 4929: 4928: 4925: 4923: 4922:Quantum money 4920: 4918: 4915: 4913: 4910: 4909: 4907: 4905: 4901: 4895: 4892: 4888: 4885: 4884: 4883: 4880: 4876: 4873: 4872: 4871: 4868: 4866: 4863: 4861: 4858: 4856: 4853: 4849: 4846: 4844: 4841: 4840: 4839: 4836: 4835: 4833: 4831:communication 4827: 4821: 4818: 4816: 4813: 4811: 4808: 4806: 4803: 4801: 4798: 4796: 4793: 4791: 4788: 4786: 4783: 4781: 4778: 4776: 4773: 4771: 4768: 4766: 4763: 4761: 4758: 4756: 4753: 4751: 4748: 4746: 4743: 4742: 4740: 4736: 4728: 4725: 4724: 4723: 4720: 4716: 4713: 4712: 4711: 4708: 4706: 4703: 4701: 4698: 4696: 4693: 4689: 4686: 4685: 4684: 4681: 4679: 4676: 4674: 4671: 4670: 4668: 4664: 4660: 4653: 4648: 4646: 4641: 4639: 4634: 4633: 4630: 4620: 4616: 4612: 4611: 4603: 4600: 4595: 4591: 4587: 4583: 4579: 4575: 4571: 4567: 4563: 4559: 4555: 4549: 4546: 4541: 4537: 4533: 4527: 4523: 4519: 4515: 4514: 4506: 4504: 4502: 4498: 4493: 4491:9781316809976 4487: 4483: 4479: 4474: 4469: 4465: 4458: 4455: 4450: 4446: 4442: 4440:9781316848142 4436: 4432: 4428: 4424: 4423: 4415: 4413: 4409: 4404: 4400: 4396: 4392: 4388: 4384: 4379: 4374: 4370: 4366: 4362: 4358: 4354: 4350: 4343: 4340: 4335: 4331: 4327: 4321: 4317: 4316: 4311: 4305: 4302: 4290: 4286: 4280: 4277: 4272: 4268: 4264: 4263: 4255: 4252: 4247: 4243: 4239: 4235: 4231: 4225: 4222: 4217: 4213: 4209: 4205: 4201: 4195: 4192: 4187: 4183: 4179: 4175: 4171: 4167: 4163: 4157: 4154: 4149: 4145: 4141: 4137: 4133: 4129: 4125: 4121: 4117: 4111: 4108: 4097: 4093: 4086: 4083: 4078: 4074: 4070: 4066: 4061: 4056: 4052: 4048: 4044: 4040: 4034: 4031: 4026: 4022: 4018: 4014: 4010: 4006: 4002: 3998: 3992: 3989: 3984: 3980: 3976: 3972: 3968: 3964: 3960: 3956: 3950: 3947: 3942: 3938: 3934: 3932:9780080956329 3928: 3924: 3920: 3916: 3912: 3908: 3901: 3898: 3893: 3889: 3884: 3879: 3875: 3871: 3867: 3863: 3859: 3855: 3848: 3845: 3840: 3836: 3832: 3828: 3824: 3820: 3813: 3811: 3807: 3802: 3796: 3792: 3791: 3783: 3780: 3775: 3771: 3767: 3763: 3759: 3755: 3751: 3747: 3740: 3737: 3732: 3728: 3724: 3718: 3714: 3710: 3706: 3699: 3696: 3691: 3687: 3680: 3677: 3672: 3668: 3663: 3658: 3654: 3650: 3646: 3642: 3636: 3633: 3628: 3624: 3620: 3614: 3610: 3606: 3602: 3598: 3594: 3593: 3585: 3583: 3579: 3574: 3573: 3568: 3564: 3560: 3554: 3551: 3546: 3545: 3537: 3534: 3529: 3525: 3521: 3517: 3513: 3509: 3502: 3499: 3494: 3490: 3486: 3482: 3478: 3474: 3469: 3464: 3460: 3456: 3449: 3446: 3441: 3437: 3433: 3429: 3425: 3423:9781138104488 3419: 3415: 3411: 3407: 3406: 3398: 3395: 3390: 3384: 3380: 3376: 3372: 3365: 3363: 3361: 3359: 3357: 3353: 3348: 3342: 3338: 3334: 3330: 3326: 3322: 3315: 3312: 3307: 3301: 3297: 3293: 3289: 3282: 3279: 3274: 3268: 3264: 3260: 3256: 3255: 3247: 3244: 3239: 3237:9780511676550 3233: 3229: 3225: 3221: 3220: 3212: 3209: 3204: 3200: 3196: 3190: 3186: 3182: 3178: 3171: 3168: 3163: 3159: 3155: 3151: 3147: 3145:9780511976667 3141: 3137: 3133: 3129: 3122: 3120: 3118: 3116: 3114: 3112: 3110: 3108: 3106: 3104: 3102: 3100: 3096: 3091: 3087: 3083: 3081:9780199215706 3077: 3073: 3069: 3065: 3061: 3055: 3052: 3046: 3041: 3038: 3036: 3033: 3031: 3028: 3026: 3023: 3021: 3018: 3016: 3013: 3011: 3008: 3006: 3005:Quantum clock 3003: 3001: 2998: 2996: 2993: 2991: 2988: 2986: 2983: 2982: 2977: 2973: 2972: 2968: 2966: 2965: 2961: 2959: 2958: 2954: 2952: 2951: 2947: 2945: 2944: 2940: 2938: 2937: 2933: 2932: 2931: 2929: 2921: 2919: 2917: 2913: 2909: 2905: 2903: 2902:quantum noise 2899: 2895: 2891: 2886: 2878: 2876: 2871: 2863: 2861: 2859: 2854: 2852: 2851:quantum state 2848: 2847:probabilities 2844: 2843:superposition 2840: 2839:quantum state 2836: 2832: 2828: 2822: 2814: 2812: 2805: 2802: 2801: 2800: 2797: 2791: 2786: 2782: 2781: 2780: 2777: 2774: 2767: 2765: 2763: 2755: 2753: 2751: 2744: 2736: 2734: 2731: 2727: 2723: 2716: 2711: 2709: 2706: 2692: 2670: 2666: 2656: 2643: 2638: 2634: 2627: 2622: 2618: 2609: 2605: 2599: 2595: 2591: 2588: 2582: 2576: 2571: 2567: 2560: 2546: 2543: 2537: 2531: 2523: 2509: 2502: 2495: 2487: 2485: 2479: 2477: 2457: 2449: 2433: 2427: 2419: 2403: 2397: 2388: 2374: 2371: 2368: 2345: 2342: 2339: 2336: 2327: 2309: 2305: 2296: 2292: 2286: 2281: 2278: 2275: 2271: 2267: 2262: 2258: 2251: 2248: 2245: 2241: 2236: 2230: 2222: 2218: 2209: 2193: 2189: 2185: 2182: 2179: 2176: 2173: 2168: 2164: 2138: 2134: 2127: 2124: 2121: 2118: 2115: 2112: 2104: 2100: 2093: 2090: 2082: 2078: 2071: 2063: 2062:RĂ©nyi entropy 2057: 2056:RĂ©nyi entropy 2050:RĂ©nyi entropy 2049: 2047: 2043: 2025: 2021: 2014: 2011: 2006: 2002: 1993: 1989: 1982: 1977: 1972: 1969: 1966: 1962: 1958: 1955: 1944: 1940: 1933: 1930: 1927: 1924: 1921: 1918: 1910: 1906: 1899: 1896: 1888: 1884: 1877: 1871: 1868: 1862: 1856: 1848: 1832: 1828: 1824: 1821: 1818: 1815: 1812: 1807: 1803: 1777: 1773: 1766: 1763: 1760: 1757: 1754: 1751: 1743: 1739: 1732: 1729: 1721: 1717: 1710: 1701: 1696: 1690: 1682: 1680: 1678: 1670: 1668: 1662: 1660: 1658: 1654: 1650: 1646: 1642: 1638: 1634: 1630: 1625: 1618: 1616: 1610: 1607: 1604: 1600: 1596: 1592: 1588: 1584: 1580: 1576: 1572: 1568: 1565: 1562:, called the 1561: 1558: 1554: 1551: 1547: 1543: 1539: 1536: 1532: 1528: 1523: 1520: 1517: 1513: 1508: 1507: 1506: 1504: 1500: 1499:Boolean logic 1496: 1492: 1491:quantum gates 1488: 1484: 1476: 1474: 1472: 1468: 1460: 1457: 1454: 1450: 1446: 1443: 1440: 1437: 1434: 1431: 1428: 1425: 1424: 1423: 1421: 1417: 1413: 1409: 1404: 1402: 1398: 1382: 1376: 1373: 1370: 1367: 1361: 1358: 1355: 1352: 1346: 1340: 1320: 1313: 1309: 1305: 1301: 1297: 1293: 1289: 1281: 1279: 1277: 1272: 1270: 1266: 1258: 1256: 1254: 1250: 1246: 1242: 1238: 1237:Richard Jozsa 1234: 1233:David Deutsch 1229: 1226: 1222: 1217: 1215: 1211: 1207: 1201: 1197: 1189: 1187: 1184: 1179: 1178: 1174: 1167: 1159: 1157: 1155: 1151: 1146: 1144: 1140: 1132: 1130: 1128: 1123: 1119: 1111: 1087: 1083: 1070: 1067: 1063: 1059: 1056: 1052: 1045: 1031: 1021: 1017: 1004: 1001: 997: 993: 989: 985: 979: 965: 957: 954: 934: 930: 916: 912: 908: 901: 887: 877: 873: 859: 855: 852: 848: 844: 838: 824: 816: 814: 811: 810: 789: 785: 772: 769: 765: 761: 758: 754: 742: 732: 728: 715: 712: 708: 704: 700: 696: 690: 676: 668: 648: 644: 630: 626: 623: 619: 607: 597: 593: 579: 575: 571: 567: 561: 547: 539: 536: 534: 531: 530: 509: 495: 480: 476: 463: 460: 456: 452: 448: 444: 435: 421: 408: 405: 385: 371: 356: 352: 338: 334: 331: 327: 323: 314: 300: 287: 285: 282: 281: 277: 274: 271: 268: 265: 262: 261: 254: 249: 247: 242: 240: 235: 234: 231: 224: 221: 220: 215: 212: 208: 204: 200: 198: 194: 190: 182: 177: 175: 173: 169: 164: 162: 158: 154: 150: 146: 141: 139: 135: 131: 127: 122: 119: 115: 112:, due to the 111: 107: 103: 99: 95: 91: 87: 83: 79: 75: 70: 68: 64: 60: 56: 52: 48: 39: 33: 19: 6595: 6532:Anti-gravity 6476:metamaterial 6440: 6404:post-quantum 6399:cryptography 6119: 6013:Quantum mind 5925:Franck–Hertz 5787:Klein–Gordon 5736:Formulations 5729:Formulations 5658:Interference 5648:Entanglement 5626:Ground state 5621:Energy level 5594:Fundamentals 5558:Introduction 5398:Charge qubit 5323:KLM protocol 5272: 5136: 5126: 4820:Purification 4750:Eastin–Knill 4694: 4609: 4602: 4561: 4557: 4548: 4512: 4463: 4457: 4421: 4368: 4364: 4342: 4314: 4304: 4292:. Retrieved 4288: 4279: 4261: 4254: 4237: 4233: 4224: 4207: 4203: 4194: 4172:(1): 82–85. 4169: 4165: 4156: 4123: 4119: 4110: 4099:. Retrieved 4095: 4085: 4050: 4046: 4033: 4008: 4004: 3991: 3966: 3962: 3949: 3906: 3900: 3857: 3853: 3847: 3822: 3818: 3789: 3782: 3749: 3745: 3739: 3704: 3698: 3689: 3679: 3652: 3648: 3635: 3609:10.1142/3724 3591: 3571: 3553: 3543: 3536: 3511: 3507: 3501: 3458: 3454: 3448: 3404: 3397: 3370: 3320: 3314: 3287: 3281: 3253: 3246: 3218: 3211: 3176: 3170: 3127: 3063: 3054: 2969: 2962: 2955: 2948: 2941: 2934: 2925: 2911: 2906: 2889: 2888: 2873: 2855: 2824: 2809: 2798: 2795: 2778: 2771: 2759: 2746: 2726:Dense coding 2720: 2712:Applications 2707: 2657: 2524: 2497: 2483: 2389: 2328: 2210: 2059: 2044: 1849: 1702: 1698: 1674: 1666: 1622: 1614: 1601:is known as 1483:Bloch sphere 1480: 1464: 1448: 1411: 1408:Bloch sphere 1405: 1285: 1273: 1262: 1230: 1228:algorithms. 1218: 1203: 1180: 1176: 1173:Cryptography 1169: 1147: 1136: 1118:Stratonovich 1115: 216: 201: 186: 172:cryptography 165: 142: 140:techniques. 123: 102:neuroscience 90:cryptography 71: 58: 46: 45: 6547:Force field 6496:programming 6456:logic clock 6441:information 6416:electronics 6271:EPR paradox 6051:Quantum bus 5920:Double-slit 5898:Experiments 5864:Many-worlds 5802:Schrödinger 5766:Phase space 5756:Schrödinger 5746:Interaction 5703:Uncertainty 5673:Nonlocality 5668:Measurement 5663:Decoherence 5653:Hamiltonian 5429:programming 5408:Phase qubit 5313:Circuit QED 4785:No-deleting 4727:cloud-based 4361:Lloyd, Seth 4053:(1): 7–11. 2898:decoherence 2892:is used in 2448:min-entropy 1306:. Given a 1221:Moore's law 1206:Alan Turing 276:Interaction 264:Schrödinger 207:Schrödinger 157:mathematics 149:transmitted 118:observables 6461:logic gate 6359:algorithms 6199:Extensions 6033:Technology 5879:Relational 5830:Copenhagen 5741:Heisenberg 5688:Tunnelling 5551:Background 5469:libquantum 5403:Flux qubit 5308:Cavity QED 5257:Bacon–Shor 5247:stabilizer 4775:No-cloning 4449:1034577167 4334:1038428525 4294:4 December 4101:2020-11-13 4060:2003.06557 4025:0433.94008 3983:0317.94003 3731:j.ctt7s8nw 3514:: 92–100. 3468:2012.07836 3440:1390.81001 3432:1003273264 3047:References 2908:Peter Shor 2900:and other 1693:See also: 1416:impossible 1245:Peter Shor 1194:See also: 1164:See also: 1116:In 1960s, 533:Observable 270:Heisenberg 211:Heisenberg 153:algorithms 98:psychology 86:philosophy 42:computers. 6506:simulator 6394:computing 6364:amplifier 5905:Bell test 5775:Equations 5601:Born rule 5375:NV center 4810:Threshold 4790:No-hiding 4755:Gleason's 4540:255569451 4473:1106.1445 4403:119250535 4378:1110.3234 4289:Mi.ras.ru 3892:121571330 3657:CiteSeerX 3493:221237249 3461:: 16–32. 3154:665137861 3090:822959053 2693:ρ 2667:λ 2635:λ 2628:⁡ 2606:λ 2596:∑ 2592:− 2583:ρ 2577:⁡ 2561:ρ 2547:− 2544:≡ 2538:ρ 2510:ρ 2464:∞ 2461:→ 2431:→ 2401:→ 2372:≠ 2349:∞ 2272:∑ 2268:⁡ 2249:− 2012:⁡ 1963:∑ 1959:− 1647:over the 1535:entangled 1467:unitarity 1377:ρ 1374:⁡ 1368:ρ 1362:⁡ 1356:− 1347:ρ 1321:ρ 1139:atom trap 1092:ℏ 1057:− 1032:ρ 1026:ℏ 966:ρ 955:constant 939:ℏ 888:ρ 882:ℏ 853:− 825:ρ 794:ℏ 759:− 737:ℏ 653:ℏ 624:− 602:ℏ 537:constant 516:⟩ 496:ψ 485:ℏ 442:⟩ 422:ψ 406:constant 392:⟩ 372:ψ 361:ℏ 332:− 321:⟩ 301:ψ 284:Ket state 6613:Category 6411:dynamics 6294:Category 6088:Timeline 5840:Ensemble 5820:Bayesian 5713:Collapse 5585:Glossary 5568:Timeline 5437:OpenQASM 5413:Transmon 5290:Physical 5090:Quantum 4991:Grover's 4765:Holevo's 4738:Theorems 4688:timeline 4678:NISQ era 4619:18346434 4594:19708593 4586:10045619 4077:27022972 3999:(1979). 3957:(1973). 3839:51631629 3692:: 12–17. 3627:52859247 3485:32822698 3203:68629072 3162:59717455 3062:(2006). 2978:See also 2922:Journals 1589:include 1412:smallest 1141:and the 1122:Helstrom 6501:sensing 6481:network 6466:machine 6436:imaging 6384:circuit 6379:channel 6351:Quantum 6247:Related 6226:History 5965:Science 5797:Rydberg 5563:History 5427:Quantum 5365:Kane QC 5224:Quantum 5152:Quantum 5081:PostBQP 5051:Quantum 5036:Simon's 4829:Quantum 4666:General 4566:Bibcode 4383:Bibcode 4186:6519532 4148:1438116 4128:Bibcode 4017:0581651 3975:0456936 3941:2020051 3862:Bibcode 3774:4194913 3754:Bibcode 3597:Bibcode 3516:Bibcode 3325:Bibcode 2950:Quantum 1560:entropy 1557:Shannon 1420:measure 1249:problem 230:Picture 6491:optics 6343:Fields 5940:Popper 5445:IBM QX 5441:Qiskit 5380:NMR QC 5358:-based 5262:Steane 5233:Codes 5031:Shor's 4937:SARG04 4745:Bell's 4617:  4592:  4584:  4538:  4528:  4488:  4447:  4437:  4401:  4332:  4322:  4184:  4146:  4075:  4023:  4015:  3981:  3973:  3939:  3929:  3890:  3837:  3797:  3772:  3746:Nature 3729:  3719:  3659:  3625:  3615:  3491:  3483:  3438:  3430:  3420:  3385:  3343:  3302:  3269:  3234:  3201:  3191:  3160:  3152:  3142:  3088:  3078:  3035:Qutrit 2658:where 2631:  2615:  2580:  2564:  2446:, and 1629:photon 1081:  1015:  928:  871:  783:  726:  642:  591:  474:  350:  161:qubits 6520:Other 6451:logic 5850:Local 5792:Pauli 5782:Dirac 5267:Toric 4710:Qubit 4615:S2CID 4590:S2CID 4468:arXiv 4399:S2CID 4373:arXiv 4182:S2CID 4144:S2CID 4073:S2CID 4055:arXiv 3888:S2CID 3835:S2CID 3770:S2CID 3727:JSTOR 3489:S2CID 3463:arXiv 3158:S2CID 3030:Qubit 2831:qubit 2450:when 2416:, of 1631:in a 1296:qubit 1276:qubit 217:See: 108:. In 53:of a 51:state 6597:List 5459:Cirq 5450:Quil 5356:Spin 5252:Shor 4932:BB84 4865:LOCC 4582:PMID 4536:OCLC 4526:ISBN 4486:ISBN 4445:OCLC 4435:ISBN 4330:OCLC 4320:ISBN 4296:2018 3937:OCLC 3927:ISBN 3795:ISBN 3717:ISBN 3623:OCLC 3613:ISBN 3481:PMID 3428:OCLC 3418:ISBN 3383:ISBN 3341:ISBN 3300:ISBN 3267:ISBN 3232:ISBN 3199:OCLC 3189:ISBN 3150:OCLC 3140:ISBN 3086:OCLC 3076:ISBN 2762:BB84 2756:BB84 2728:and 2361:and 2346:< 2340:< 2329:for 2060:The 1451:via 1449:e.g. 1235:and 1198:and 1183:BB84 278:(I) 272:(H) 266:(S) 100:and 88:and 6369:bus 5273:gnu 5237:CSS 5114:XEB 5076:QMA 5071:QIP 5066:EQP 5061:BQP 5041:VQE 4996:HHL 4800:PBR 4574:doi 4518:doi 4478:doi 4427:doi 4391:doi 4267:hdl 4242:doi 4212:doi 4174:doi 4136:doi 4124:400 4065:doi 4051:560 4021:Zbl 3979:Zbl 3919:hdl 3911:doi 3878:hdl 3870:doi 3827:doi 3762:doi 3750:204 3709:doi 3667:doi 3605:doi 3524:doi 3473:doi 3459:158 3436:Zbl 3410:doi 3375:doi 3333:doi 3292:doi 3259:doi 3224:doi 3181:doi 3132:doi 3068:doi 2890:QEC 2835:bit 2792:B92 2773:E91 2768:E91 2619:log 2568:log 2259:log 2003:log 1603:BQP 1489:or 1418:to 1292:bit 1288:bit 6615:: 5464:Q# 4588:. 4580:. 4572:. 4562:68 4560:. 4534:. 4524:. 4500:^ 4484:. 4476:. 4443:. 4433:. 4411:^ 4397:. 4389:. 4381:. 4369:84 4367:. 4359:; 4355:; 4351:; 4328:. 4287:. 4238:27 4236:. 4208:27 4206:. 4180:. 4170:86 4168:. 4142:. 4134:. 4122:. 4094:. 4071:. 4063:. 4049:. 4041:; 4019:. 4013:MR 4009:15 4007:. 4003:. 3977:. 3971:MR 3965:. 3961:. 3935:. 3925:. 3917:. 3886:. 3876:. 3868:. 3856:. 3833:. 3823:50 3821:. 3809:^ 3768:. 3760:. 3748:. 3725:. 3715:. 3688:. 3665:. 3653:44 3651:. 3643:; 3621:. 3611:. 3603:. 3581:^ 3565:; 3561:; 3522:. 3512:55 3510:. 3487:. 3479:. 3471:. 3457:. 3434:. 3426:. 3416:. 3381:. 3355:^ 3339:. 3331:. 3298:. 3265:. 3230:. 3197:. 3187:. 3156:. 3148:. 3138:. 3098:^ 3084:. 3074:. 2860:. 2705:. 2522:: 2476:. 2387:. 1505:. 1455:). 1403:. 1371:ln 1359:Tr 1216:. 1120:, 258:) 174:. 147:, 96:, 84:, 80:, 76:, 6328:e 6321:t 6314:v 5536:e 5529:t 5522:v 5452:– 5443:– 5439:– 5140:2 5137:T 5130:1 5127:T 4651:e 4644:t 4637:v 4621:. 4596:. 4576:: 4568:: 4542:. 4520:: 4494:. 4480:: 4470:: 4451:. 4429:: 4405:. 4393:: 4385:: 4375:: 4336:. 4298:. 4273:. 4269:: 4248:. 4244:: 4218:. 4214:: 4188:. 4176:: 4150:. 4138:: 4130:: 4104:. 4079:. 4067:: 4057:: 4027:. 3985:. 3967:9 3943:. 3921:: 3913:: 3894:. 3880:: 3872:: 3864:: 3858:1 3841:. 3829:: 3803:. 3776:. 3764:: 3756:: 3733:. 3711:: 3673:. 3669:: 3629:. 3607:: 3599:: 3530:. 3526:: 3518:: 3495:. 3475:: 3465:: 3442:. 3412:: 3391:. 3377:: 3349:. 3335:: 3327:: 3308:. 3294:: 3275:. 3261:: 3240:. 3226:: 3205:. 3183:: 3164:. 3134:: 3092:. 3070:: 2671:i 2644:, 2639:i 2623:2 2610:i 2600:i 2589:= 2586:) 2572:2 2558:( 2554:r 2551:t 2541:) 2535:( 2532:S 2458:r 2434:0 2428:r 2404:1 2398:r 2375:1 2369:r 2343:r 2337:0 2315:) 2310:i 2306:a 2302:( 2297:r 2293:P 2287:n 2282:1 2279:= 2276:i 2263:2 2252:r 2246:1 2242:1 2237:= 2234:) 2231:A 2228:( 2223:r 2219:H 2194:n 2190:a 2186:, 2183:. 2180:. 2177:. 2174:, 2169:1 2165:a 2144:) 2139:n 2135:a 2131:( 2128:P 2125:, 2122:. 2119:. 2116:. 2113:, 2110:) 2105:2 2101:a 2097:( 2094:P 2091:, 2088:) 2083:1 2079:a 2075:( 2072:P 2031:) 2026:i 2022:x 2018:( 2015:P 2007:2 1999:) 1994:i 1990:x 1986:( 1983:P 1978:n 1973:1 1970:= 1967:i 1956:= 1953:] 1950:) 1945:n 1941:x 1937:( 1934:P 1931:, 1928:. 1925:. 1922:. 1919:, 1916:) 1911:2 1907:x 1903:( 1900:P 1897:, 1894:) 1889:1 1885:x 1881:( 1878:P 1875:[ 1872:H 1869:= 1866:) 1863:X 1860:( 1857:H 1833:n 1829:x 1825:, 1822:. 1819:. 1816:. 1813:, 1808:1 1804:x 1783:) 1778:n 1774:x 1770:( 1767:P 1764:, 1761:. 1758:. 1755:. 1752:, 1749:) 1744:2 1740:x 1736:( 1733:P 1730:, 1727:) 1722:1 1718:x 1714:( 1711:P 1605:. 1566:. 1521:. 1383:. 1380:) 1365:( 1353:= 1350:) 1344:( 1341:S 1088:/ 1084:t 1075:S 1071:, 1068:0 1064:H 1060:i 1053:e 1049:) 1046:t 1043:( 1037:S 1022:/ 1018:t 1009:S 1005:, 1002:0 998:H 994:i 990:e 986:= 983:) 980:t 977:( 971:I 935:/ 931:t 922:S 917:H 913:i 909:e 905:) 902:0 899:( 893:S 878:/ 874:t 865:S 860:H 856:i 849:e 845:= 842:) 839:t 836:( 830:S 790:/ 786:t 777:S 773:, 770:0 766:H 762:i 755:e 748:S 743:A 733:/ 729:t 720:S 716:, 713:0 709:H 705:i 701:e 697:= 694:) 691:t 688:( 682:I 677:A 649:/ 645:t 636:S 631:H 627:i 620:e 613:S 608:A 598:/ 594:t 585:S 580:H 576:i 572:e 568:= 565:) 562:t 559:( 553:H 548:A 513:) 510:t 507:( 501:S 491:| 481:/ 477:t 468:S 464:, 461:0 457:H 453:i 449:e 445:= 439:) 436:t 433:( 427:I 417:| 389:) 386:0 383:( 377:S 367:| 357:/ 353:t 344:S 339:H 335:i 328:e 324:= 318:) 315:t 312:( 306:S 296:| 252:e 245:t 238:v 232:( 34:. 20:)

Index

Quantum Information
npj Quantum Information

state
quantum system
quantum information processing
Von Neumann entropy
quantum mechanics
computer science
information theory
philosophy
cryptography
cognitive science
psychology
neuroscience
scientific method
quantum mechanics
uncertainty principle
observables
quantum mechanics
quantum information science
quantum computation
quantum information processing
digital computers
transmitted
algorithms
mathematics
qubits
quantum computing
cryptography

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