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Ghirardi–Rimini–Weber theory

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1400:. These are phenomenological parameters, whose values are not fixed by any principle and should be understood as new constants of Nature. Comparison of the model's predictions with experimental data permits bounding of the values of the parameters (see CSL model). The collapse rate should be such that microscopic object are almost never localized, thus effectively recovering standard quantum mechanics. The value originally proposed was 1943: 4094: 90:). The imprecise “observer” and “measurement” that plague the orthodox interpretation are thus avoided because the wave function collapses spontaneously. Furthermore, thanks to a so called “amplification mechanism” (later discussed), collapse theories recover both quantum mechanics for microscopic objects, and classical mechanics for macroscopic ones. 1642: 3789: 3779: 85:
avoid the measurement problem by merging the two dynamical principles of quantum mechanics in a unique dynamical description. The physical idea that underlies collapse theories is that particles undergo spontaneous wave-function collapses, which occur randomly both in time (at a given average rate),
139:, according to which the wave function does not give a complete description of a physical system. The GRW theory differs from standard quantum mechanics for the dynamical principles according to which the wave function evolves. More philosophical issues related to the GRW theory and to 749: 284: 1312: 66:
every time an observer performs a measurement. One thus faces the problem of defining what an “observer” and a “measurement” are. Another issue of quantum mechanics is that it forecasts superpositions of macroscopic objects, which are not observed in nature (see
1938:{\displaystyle \psi (x)={\frac {1}{(\pi \sigma )^{\frac {1}{4}}}}\,e^{-{\frac {(x-a)^{2}}{2\sigma ^{2}}}}\quad \longrightarrow \quad \psi _{a}(x)={\hat {L}}_{x=a}\,\psi (x)={\cal {N}}e^{-{\frac {(x-a)^{2}}{2r_{C}^{2}}}}\,e^{-{\frac {(x-a)^{2}}{2\sigma ^{2}}}}} 1075: 4089:{\displaystyle {\hat {T}}_{\mathrm {CM} }=\left({\frac {1}{\pi r_{C}^{2}}}\right)^{\frac {3}{2}}\int _{\infty }^{\infty }d^{3}x\,e^{-{\frac {({\hat {Q}}-x)^{2}}{2r_{C}^{2}}}}\,\rho _{\mathrm {CM} }(t)\,e^{-{\frac {({\hat {Q}}-x)^{2}}{2r_{C}^{2}}}}} 2980: 3530: 4475:
process according to which the off-diagonal elements of the statistical operator are suppressed exponentially. This is a feature that the GRW theory shares with other collapse theories: those involving white noises are associated to
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GRW is a non relativistic theory, its relativistic extension for non-interacting particles has been investigated by Tumulka, while interacting models are still under investigation.
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Ghirardi, Gian Carlo; Pearle, Philip; Rimini, Alberto (1990-07-01). "Markov processes in Hilbert space and continuous spontaneous localization of systems of identical particles".
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Bassi, Angelo; Ferialdi, Luca (2009-07-31). "Non-Markovian dynamics for a free quantum particle subject to spontaneous collapse in space: General solution and main properties".
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When the wave function is hit by a sudden jump, the action of the localization operator essentially results in the multiplication of the wave function by the collapse Gaussian.
406: 3464: 4462:. Although such an energy increase is negligible, this feature of the model is not appealing. For this reason, a dissipative extension of the GRW theory has been investigated. 3016: 2146: 2003: 4203: 3359: 788: 178: 3276:
This is one of the most important features of the GRW theory, because it allows us to recover classical mechanics for macroscopic objects. Let us consider a rigid body of
1110: 3052: 3323: 1970: 1344: 900: 3774:{\displaystyle {\frac {d}{dt}}\rho _{\mathrm {CM} }(t)=-{\frac {i}{\hbar }}-\sum _{i=1}^{N}\lambda _{i}\left(\rho _{\mathrm {CM} }(t)-{\hat {T}}_{\mathrm {CM} }\right)} 127:(or state vector) represents the most accurate possible specification of the state of a physical system. This is a feature that the GRW theory shares with the standard 4566: 4223: 4137: 4117: 1371: 474: 2425: 1583: 4119:
that is the sum of the rates of its constituents: this is the amplification mechanism. If for simplicity one assumes that all particles collapse with the same rate
3491: 1398: 835: 2178: 2418: 2204: 1635: 1609: 874: 5670: 3294: 1130: 808: 494: 446: 426: 4323:. Fast reduction of macroscopic object superpositions is thus guaranteed, and the GRW theory effectively recovers classical mechanics for macroscopic objects. 1554:
for the localization distance. This is a mesoscopic distance, such that microscopic superpositions are left unaltered, while macroscopic ones are collapsed.
2010: 71:). The theory does not tell where the threshold between the microscopic and macroscopic worlds is, that is when quantum mechanics should leave space to 2148:
is another normalization factor. One thus finds that after the sudden jump has occurred, the initially delocalised wave function has become localized.
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The GRW is the first spontaneous collapse theory that was devised. In the following years several different models were proposed. Among these are
2209: 292: 4500: 128: 744:{\displaystyle {\hat {L}}_{x}^{i}=\left({\frac {1}{\pi r_{C}^{2}}}\right)^{\frac {3}{4}}e^{-{\frac {({\hat {q}}_{i}-x)^{2}}{2r_{C}^{2}}}}} 499: 114:
the coloured QMUPL model, which is the only collapse model involving coloured stochastic processes for which the exact solution is known.
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The GRW theory does not allow for identical particles. An extension of the theory with identical particles has been proposed by Tumulka.
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as its practically unique effect, that of inducing a very fast suppression of coherence among macroscopically distinguishable states
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Diósi, L.; Ferialdi, L. (2014-11-12). "General Non-Markovian Structure of Gaussian Master and Stochastic Schr\"odinger Equations".
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particles whose statistical operator evolves according to the master equation described above. We introduce the center of mass (
279:{\displaystyle |\psi \rangle \rightarrow {\frac {|\psi _{x}^{i}\rangle }{\sqrt {\langle \psi _{x}^{i}|\psi _{x}^{i}\rangle }}}} 3364: 3268:
We thus see that the Gaussian that is hit by the localization is left unchanged, while the other is exponentially suppressed.
4406: 1307:{\displaystyle {\frac {d}{dt}}\rho (t)=-{\frac {i}{\hbar }}-\sum _{i=1}^{N}\lambda _{i}\left(\rho (t)-{\hat {T}}_{i}\right)} 5310:
Smirne, Andrea; Vacchini, Bassano; Bassi, Angelo (2014-12-31). "Dissipative extension of the Ghirardi-Rimini-Weber model".
4344: 4277: 3059: 5675: 4228: 1403: 905: 1458: 136: 4350: 105: 140: 82: 59: 28: 4975:
Ferialdi, Luca; Bassi, Angelo (2012-04-26). "Exact Solution for a Non-Markovian Dissipative Quantum Dynamics".
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that the system keeps evolving according to the Schrödinger equation. Accordingly, the GRW master equation for
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Ghirardi, G.C., Rimini, A., and Weber, T. (1986). "Unified dynamics for microscopic and macroscopic systems".
1070:{\displaystyle {\hat {T}}_{i}\equiv \int dx\,{\hat {L}}_{x}^{i}|\psi \rangle \langle \psi |{\hat {L}}_{x}^{i}} 1506:(with an uncertainty of two orders of magnitude) is more adequate. There is a general consensus on the value 2151:
Another interesting case is when the initial state is the superposition of two Gaussian states, centered at
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Bassi, Angelo; Ferialdi, Luca (2009-07-28). "Non-Markovian Quantum Trajectories: An Exact Result".
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Tumulka, Roderich (2006-06-08). "On spontaneous wave function collapse and quantum field theory".
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Bassi, Angelo; Lochan, Kinjalk; Satin, Seema; Singh, Tejinder P.; Ulbricht, Hendrik (2013-04-02).
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master equations, while the coloured QMUPL model follows a non-Markovian Gaussian master equation.
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is a normalization factor. Let us further assume that the initial state is delocalised, i.e. that
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Ferialdi, Luca; Bassi, Angelo (2012-08-08). "Dissipative collapse models with nonwhite noises".
3434:. One can show that, when the system Hamiltonian can be split into a center of mass Hamiltonian 3299: 2975:{\displaystyle \psi _{a}(x)={\cal {N}}e^{-{\frac {(x-a)^{2}}{2r_{C}^{2}}}}\left={\cal {N}}\left} 1951: 1320: 879: 5603:
Ferialdi, L. (2016-03-22). "Exact Closed Master Equation for Gaussian Non-Markovian Dynamics".
4343:). This introduces a steady amount of energy in the system, thus leading to a violation of the 5638: 5577: 5516: 5461: 5226: 5136: 5018: 5010: 4949: 4888: 4880: 4819: 4758: 4705: 4662: 4654: 4629:
Diósi, L. (1989-08-01). "Models for universal reduction of macroscopic quantum fluctuations".
4608: 4548: 4333: 4208: 4122: 4102: 3361:) position operators, which allow us to rewrite each particle's position operator as follows: 1356: 580: 459: 47: 32: 5426:
Tumulka, Roderich (2006-11-01). "A Relativistic Version of the Ghirardi–Rimini–Weber Model".
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Romero-Isart, Oriol (2011). "Quantum Superposition of Massive Objects and Collapse Models".
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principle. For the GRW model, one can show that energy grows linearly in time with rate
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Bassi, Angelo (2005-04-08). "Collapse models: analysis of the free particle dynamics".
3279: 1115: 850: 793: 479: 431: 411: 5222: 5189:"Lower and upper bounds on CSL parameters from latent image formation and IGM heating" 5075: 4754: 4339:
The collapse noise repeatedly kicks the particles, thus inducing a diffusion process (
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the QMUPL model, which proves important mathematical results on collapse theories; and
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Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
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has two fundamentally different dynamical principles: the linear and deterministic
2109:{\displaystyle \psi _{a}(x)\simeq {\cal {N}}'e^{-{\frac {(x-a)^{2}}{2r_{C}^{2}}}}} 841:
In between two localization processes, the wave function evolves according to the
5488: 4477: 5341: 5288: 5099:"Models of wave-function collapse, underlying theories, and experimental tests" 4945: 4815: 1611:, and let us assume that this undergoes a localization process at the position 5457: 5132: 5044:
Bassi, Angelo; Ghirardi, GianCarlo (June 2003). "Dynamical reduction models".
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Two new parameters are introduced by the GRW theory, namely the collapse rate
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An object that consists of in the order of the Avogadro number of nucleons (
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formalism. Since the localization process is Poissonian, in a time interval
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Penrose, Roger (May 1996). "On Gravity's role in Quantum State Reduction".
4604: 4666: 4612: 4552: 2387:{\displaystyle \psi (x)={\frac {1}{2(\pi \sigma )^{\frac {1}{4}}}}\,\left} 5440: 5387: 5205: 5058: 4745: 452:
The localization process is random both in space and time. The jumps are
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Each particle of a system described by the multi-particle wave function
5512: 5350: 4701: 360:{\displaystyle |\psi _{x}^{i}\rangle ={\hat {L}}_{x}^{i}|\psi \rangle } 5170:(Summer 2020 ed.), Metaphysics Research Lab, Stanford University 180:
independently undergoes a spontaneous localization process (or jump):
5188: 569:{\displaystyle P_{i}(x)=\langle \psi _{x}^{i}|\psi _{x}^{i}\rangle } 5617: 1346:
is the Hamiltonian of the system, and the square brackets denote a
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These principles can be expressed in a more compact way with the
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One thus sees that the center of mass collapses with a rate
3088: 2640: 2453: 2129: 2039: 1957: 1818: 4205:) collapses almost instantly: GRW's and Adler's values of 476:; the probability density for a jump to occur at position 143:
in general one have been discussed by Ghirardi and Bassi.
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The GRW theory makes different predictions than standard
3427:{\displaystyle {\hat {q}}_{i}={\hat {Q}}+{\hat {r}}_{i}} 4455:{\displaystyle \simeq 10^{-14}\mathrm {erg\,\,s} ^{-1}} 4336:, and as such can be tested against it (see CSL model). 2985:
If one assumes that  each Gaussian is localized (
101:, which is formulated in terms of identical particles; 4409: 4353: 4280: 4231: 4211: 4178: 4145: 4125: 4105: 3792: 3533: 3499: 3472: 3440: 3367: 3331: 3302: 3282: 3062: 3024: 3018:) and that the overall superposition is delocalised ( 2991: 2428: 2400: 2212: 2186: 2157: 2125: 2013: 1978: 1954: 1645: 1617: 1591: 1571: 1565:
Let us consider a Gaussian wave function with spread
1512: 1461: 1406: 1379: 1359: 1323: 1140: 1118: 1086: 955: 908: 882: 859: 816: 796: 760: 592: 502: 482: 462: 434: 414: 373: 295: 189: 158: 3525:
evolves according to the following master equation:
108:, which relates the spontaneous collapse to gravity; 5489:"On the generators of quantum dynamical semigroups" 4316:{\displaystyle \Lambda =10^{15}\,\mathrm {s} ^{-1}} 3258:{\displaystyle \psi _{a}(x)\simeq {\cal {N}}'\left} 123:The first assumption of the GRW theory is that the 5193:Journal of Physics A: Mathematical and Theoretical 4471:The master equation of the GRW theory describes a 4454: 4395: 4315: 4267:{\displaystyle \Lambda =10^{7}\,\mathrm {s} ^{-1}} 4266: 4217: 4197: 4161: 4131: 4111: 4088: 3773: 3517: 3485: 3458: 3426: 3353: 3317: 3288: 3257: 3046: 3010: 2974: 2412: 2386: 2198: 2172: 2140: 2108: 1997: 1964: 1937: 1629: 1603: 1577: 1546: 1498: 1444:{\displaystyle \lambda =10^{-16}\mathrm {s} ^{-1}} 1443: 1392: 1365: 1338: 1306: 1124: 1104: 1080:In the same time interval, there is a probability 1069: 940:{\displaystyle \rho =|\psi \rangle \langle \psi |} 939: 894: 868: 829: 802: 782: 743: 568: 488: 468: 440: 420: 400: 359: 278: 172: 4624: 4622: 1499:{\displaystyle \lambda =10^{-8}\mathrm {s} ^{-1}} 902:that a collapse occurs, i.e. that the pure state 4733:Journal of Physics A: Mathematical and General 4396:{\displaystyle \lambda \hbar ^{2}/4mr_{C}^{2}} 16:Objective collapse theory in quantum mechanics 43:Measurement problem and spontaneous collapses 8: 4565:: CS1 maint: multiple names: authors list ( 4403:, which for a macroscopic object amounts to 1032: 1029: 947:is transformed into the statistical mixture 926: 923: 563: 525: 354: 316: 270: 232: 227: 198: 167: 5162:Ghirardi, Giancarlo; Bassi, Angelo (2020), 75:. The aforementioned issues constitute the 58:postulate. The orthodox interpretation, or 3493:, the center of mass statistical operator 5616: 5555: 5439: 5386: 5349: 5323: 5270: 5204: 5114: 5057: 4988: 4927: 4858: 4797: 4744: 4443: 4438: 4437: 4427: 4417: 4408: 4387: 4382: 4367: 4361: 4352: 4304: 4299: 4297: 4291: 4279: 4255: 4250: 4248: 4242: 4230: 4210: 4189: 4177: 4155: 4144: 4124: 4104: 4075: 4070: 4055: 4034: 4033: 4027: 4023: 4018: 3999: 3998: 3993: 3982: 3977: 3962: 3941: 3940: 3934: 3930: 3925: 3916: 3906: 3901: 3886: 3873: 3868: 3855: 3825: 3824: 3807: 3806: 3795: 3794: 3791: 3744: 3743: 3726: 3725: 3714: 3713: 3690: 3689: 3674: 3664: 3653: 3624: 3623: 3606: 3605: 3594: 3593: 3579: 3554: 3553: 3534: 3532: 3505: 3504: 3498: 3477: 3471: 3446: 3445: 3439: 3418: 3407: 3406: 3391: 3390: 3381: 3370: 3369: 3366: 3345: 3334: 3333: 3330: 3304: 3303: 3301: 3281: 3239: 3224: 3205: 3201: 3184: 3179: 3168: 3158: 3146: 3132: 3110: 3106: 3087: 3086: 3067: 3061: 3038: 3023: 3002: 2990: 2959: 2942: 2933: 2928: 2918: 2903: 2898: 2885: 2878: 2874: 2856: 2851: 2838: 2826: 2816: 2807: 2790: 2785: 2772: 2760: 2755: 2742: 2735: 2722: 2713: 2708: 2698: 2683: 2678: 2665: 2658: 2654: 2639: 2638: 2619: 2604: 2585: 2581: 2563: 2548: 2529: 2525: 2505: 2500: 2485: 2466: 2462: 2452: 2451: 2433: 2427: 2399: 2394:. If the localization occurs e.g. around 2368: 2353: 2334: 2330: 2312: 2297: 2278: 2274: 2264: 2250: 2228: 2211: 2185: 2156: 2128: 2127: 2124: 2095: 2090: 2075: 2056: 2052: 2038: 2037: 2018: 2012: 1989: 1977: 1956: 1955: 1953: 1924: 1909: 1890: 1886: 1881: 1870: 1865: 1850: 1831: 1827: 1817: 1816: 1800: 1788: 1777: 1776: 1757: 1737: 1722: 1703: 1699: 1694: 1680: 1661: 1644: 1616: 1590: 1570: 1547:{\displaystyle r_{C}=10^{-7}\mathrm {m} } 1539: 1530: 1517: 1511: 1487: 1482: 1472: 1460: 1432: 1427: 1417: 1405: 1384: 1378: 1358: 1325: 1324: 1322: 1284: 1273: 1272: 1245: 1235: 1224: 1188: 1187: 1174: 1141: 1139: 1117: 1085: 1061: 1056: 1045: 1044: 1038: 1021: 1015: 1010: 999: 998: 996: 969: 958: 957: 954: 932: 915: 907: 881: 858: 821: 815: 795: 774: 763: 762: 759: 730: 725: 710: 694: 683: 682: 675: 671: 656: 643: 638: 625: 611: 606: 595: 594: 591: 557: 552: 543: 537: 532: 507: 501: 481: 461: 433: 413: 392: 387: 376: 375: 372: 346: 340: 335: 324: 323: 310: 305: 296: 294: 264: 259: 250: 244: 239: 221: 216: 207: 204: 190: 188: 159: 157: 5168:The Stanford Encyclopedia of Philosophy 4578: 4576: 4512: 4358: 3584: 1179: 5493:Communications in Mathematical Physics 4558: 3518:{\displaystyle \rho _{\mathrm {CM} }} 7: 5671:Interpretations of quantum mechanics 4518: 4516: 4501:Interpretations of quantum mechanics 4162:{\displaystyle \Lambda =N\,\lambda } 456:distributed in time, with mean rate 129:Interpretations of quantum mechanics 39:, Alberto Rimini, and Tullio Weber. 54:, and the nonlinear and stochastic 4682:General Relativity and Gravitation 4439: 4434: 4431: 4428: 4300: 4281: 4251: 4232: 4146: 4106: 4003: 4000: 3907: 3902: 3829: 3826: 3811: 3808: 3748: 3745: 3730: 3727: 3694: 3691: 3628: 3625: 3610: 3607: 3558: 3555: 3509: 3506: 3450: 3447: 1637:. One thus has (in one dimension) 1540: 1483: 1428: 401:{\displaystyle {\hat {L}}_{x}^{i}} 14: 3459:{\displaystyle H_{\mathrm {CM} }} 428:-th particle around the position 3011:{\displaystyle \sigma \ll r_{C}} 1998:{\displaystyle \sigma \gg r_{C}} 790:is the position operator of the 579:The localization operator has a 367:is the state after the operator 5187:Adler, Stephen L (2007-03-07). 4198:{\displaystyle N\simeq 10^{23}} 1752: 1748: 86:and in space (according to the 62:of quantum mechanics, posits a 5635:10.1103/PhysRevLett.116.120402 5574:10.1103/PhysRevLett.113.200403 5428:Journal of Statistical Physics 5007:10.1103/PhysRevLett.108.170404 4877:10.1103/PhysRevLett.103.050403 4052: 4039: 4030: 4015: 4009: 3959: 3946: 3937: 3844: 3841: 3835: 3817: 3800: 3763: 3760: 3754: 3736: 3719: 3706: 3700: 3643: 3640: 3634: 3599: 3589: 3570: 3564: 3412: 3396: 3375: 3354:{\displaystyle {\hat {r}}_{i}} 3339: 3309: 3221: 3208: 3079: 3073: 2956: 2943: 2601: 2588: 2545: 2532: 2482: 2469: 2445: 2439: 2350: 2337: 2294: 2281: 2247: 2237: 2222: 2216: 2072: 2059: 2030: 2024: 1906: 1893: 1847: 1834: 1810: 1804: 1782: 1769: 1763: 1749: 1719: 1706: 1677: 1667: 1655: 1649: 1373:and the localization distance 1330: 1296: 1290: 1278: 1265: 1259: 1214: 1211: 1205: 1193: 1184: 1165: 1159: 1050: 1039: 1022: 1004: 981: 975: 963: 933: 916: 837:is the localization distance. 783:{\displaystyle {\hat {q}}_{i}} 768: 707: 688: 678: 600: 544: 519: 513: 381: 347: 329: 297: 251: 208: 201: 191: 173:{\displaystyle |\psi \rangle } 160: 1: 5166:, in Zalta, Edward N. (ed.), 5076:10.1016/S0370-1573(03)00103-0 1105:{\displaystyle 1-\lambda dt} 131:, and distinguishes it from 21:Ghirardi–Rimini–Weber theory 5223:10.1088/1751-8113/40/12/s03 4755:10.1088/0305-4470/38/14/008 3466:and a relative Hamiltonian 3047:{\displaystyle 2a\gg r_{C}} 2141:{\displaystyle {\cal {N}}'} 5692: 5342:10.1103/PhysRevA.90.062135 5289:10.1103/PhysRevA.84.052121 4946:10.1103/PhysRevA.86.022108 4816:10.1103/PhysRevA.80.012116 3318:{\displaystyle {\hat {Q}}} 1965:{\displaystyle {\cal {N}}} 1339:{\displaystyle {\hat {H}}} 895:{\displaystyle \lambda dt} 5458:10.1007/s10955-006-9227-3 5133:10.1103/RevModPhys.85.471 5103:Reviews of Modern Physics 69:Schrödinger’s cat paradox 60:Copenhagen interpretation 4651:10.1103/PhysRevA.40.1165 4218:{\displaystyle \lambda } 4132:{\displaystyle \lambda } 4112:{\displaystyle \Lambda } 1455:proposed that the value 1366:{\displaystyle \lambda } 469:{\displaystyle \lambda } 133:hidden variable theories 5605:Physical Review Letters 5544:Physical Review Letters 4977:Physical Review Letters 4847:Physical Review Letters 4545:10.1103/PhysRevD.34.470 3272:Amplification mechanism 2005:. In this case one has 1578:{\displaystyle \sigma } 876:there is a probability 5405:10.1098/rspa.2005.1636 4605:10.1103/PhysRevA.42.78 4496:Penrose interpretation 4456: 4397: 4317: 4268: 4219: 4199: 4163: 4133: 4113: 4090: 3775: 3669: 3519: 3487: 3460: 3428: 3355: 3319: 3290: 3259: 3048: 3012: 2976: 2414: 2388: 2200: 2174: 2142: 2110: 1999: 1966: 1939: 1631: 1605: 1579: 1548: 1500: 1451:, while more recently 1445: 1394: 1367: 1340: 1308: 1240: 1126: 1106: 1071: 941: 896: 870: 831: 804: 784: 745: 570: 490: 470: 442: 422: 402: 361: 280: 174: 137:de Broglie–Bohm theory 79:in quantum mechanics. 64:wave function collapse 35:, proposed in 1986 by 5487:Lindblad, G. (1976). 4457: 4398: 4318: 4269: 4220: 4200: 4164: 4134: 4114: 4091: 3776: 3649: 3520: 3488: 3486:{\displaystyle H_{r}} 3461: 3429: 3356: 3320: 3291: 3260: 3049: 3013: 2977: 2415: 2389: 2201: 2175: 2143: 2111: 2000: 1967: 1940: 1632: 1606: 1580: 1549: 1501: 1446: 1395: 1393:{\displaystyle r_{C}} 1368: 1341: 1309: 1220: 1127: 1107: 1072: 942: 897: 871: 832: 830:{\displaystyle r_{C}} 805: 785: 746: 571: 491: 471: 443: 423: 403: 362: 281: 175: 56:wave packet reduction 4407: 4351: 4278: 4229: 4209: 4176: 4143: 4123: 4103: 3790: 3531: 3497: 3470: 3438: 3365: 3329: 3300: 3280: 3060: 3022: 2989: 2426: 2398: 2210: 2184: 2173:{\displaystyle x=-a} 2155: 2123: 2011: 1976: 1952: 1643: 1615: 1589: 1569: 1510: 1459: 1404: 1377: 1357: 1321: 1138: 1116: 1084: 953: 906: 880: 857: 851:statistical operator 843:Schrödinger equation 814: 794: 758: 590: 500: 480: 460: 432: 412: 371: 293: 187: 156: 52:Schrödinger equation 5676:Quantum measurement 5627:2016PhRvL.116l0402F 5566:2014PhRvL.113t0403D 5505:1976CMaPh..48..119L 5450:2006JSP...125..821T 5397:2006RSPSA.462.1897T 5381:(2070): 1897–1908. 5334:2014PhRvA..90f2135S 5281:2011PhRvA..84e2121R 5215:2007JPhA...40.2935A 5164:"Collapse Theories" 5125:2013RvMP...85..471B 5068:2003PhR...379..257B 4999:2012PhRvL.108q0404F 4938:2012PhRvA..86b2108F 4869:2009PhRvL.103e0403B 4808:2009PhRvA..80a2116B 4694:1996GReGr..28..581P 4643:1989PhRvA..40.1165D 4597:1990PhRvA..42...78G 4537:1986PhRvD..34..470G 4491:Quantum decoherence 4392: 4345:energy conservation 4080: 3987: 3911: 3878: 3189: 2938: 2908: 2861: 2795: 2765: 2718: 2688: 2510: 2413:{\displaystyle x=a} 2199:{\displaystyle x=a} 2100: 1875: 1630:{\displaystyle x=a} 1604:{\displaystyle x=a} 1066: 1020: 735: 648: 616: 562: 542: 397: 345: 315: 269: 249: 226: 106:Diósi–Penrose model 77:measurement problem 73:classical mechanics 27:) is a spontaneous 5513:10.1007/BF01608499 4702:10.1007/BF02105068 4452: 4393: 4378: 4313: 4264: 4225:give respectively 4215: 4195: 4159: 4139:, one simply gets 4129: 4109: 4086: 4066: 3973: 3897: 3864: 3771: 3515: 3483: 3456: 3424: 3351: 3315: 3286: 3255: 3175: 3044: 3008: 2972: 2924: 2894: 2847: 2781: 2751: 2704: 2674: 2496: 2410: 2384: 2196: 2170: 2138: 2106: 2086: 1995: 1962: 1935: 1861: 1627: 1601: 1575: 1544: 1496: 1441: 1390: 1363: 1336: 1304: 1122: 1102: 1067: 1043: 997: 937: 892: 869:{\displaystyle dt} 866: 827: 810:-th particle, and 800: 780: 741: 721: 634: 593: 566: 548: 528: 486: 466: 438: 418: 408:has localized the 398: 374: 357: 322: 301: 276: 255: 235: 212: 170: 147:Working principles 37:Giancarlo Ghirardi 5312:Physical Review A 5199:(12): 2935–2957. 4916:Physical Review A 4786:Physical Review A 4739:(14): 3173–3192. 4631:Physical Review A 4585:Physical Review A 4525:Physical Review D 4334:quantum mechanics 4082: 4042: 3989: 3949: 3894: 3880: 3803: 3722: 3602: 3587: 3547: 3415: 3399: 3378: 3342: 3312: 3289:{\displaystyle N} 3246: 3190: 3153: 2940: 2863: 2797: 2720: 2626: 2570: 2512: 2375: 2319: 2262: 2258: 2102: 1931: 1877: 1785: 1744: 1692: 1688: 1333: 1281: 1196: 1182: 1154: 1125:{\displaystyle N} 1053: 1007: 966: 803:{\displaystyle i} 771: 737: 691: 664: 650: 603: 489:{\displaystyle x} 441:{\displaystyle x} 421:{\displaystyle i} 384: 332: 274: 273: 141:collapse theories 83:Collapse theories 48:Quantum mechanics 33:quantum mechanics 5683: 5655: 5654: 5620: 5600: 5594: 5593: 5559: 5539: 5533: 5532: 5484: 5478: 5477: 5443: 5441:quant-ph/0406094 5423: 5417: 5416: 5390: 5388:quant-ph/0508230 5370: 5364: 5363: 5353: 5327: 5307: 5301: 5300: 5274: 5254: 5248: 5241: 5235: 5234: 5208: 5206:quant-ph/0605072 5184: 5178: 5177: 5176: 5175: 5159: 5153: 5152: 5118: 5094: 5088: 5087: 5061: 5059:quant-ph/0302164 5052:(5–6): 257–426. 5041: 5035: 5034: 4992: 4972: 4966: 4965: 4931: 4911: 4905: 4904: 4862: 4842: 4836: 4835: 4801: 4781: 4775: 4774: 4748: 4746:quant-ph/0410222 4728: 4722: 4721: 4677: 4671: 4670: 4637:(3): 1165–1174. 4626: 4617: 4616: 4580: 4571: 4570: 4564: 4556: 4520: 4461: 4459: 4458: 4453: 4451: 4450: 4442: 4425: 4424: 4402: 4400: 4399: 4394: 4391: 4386: 4371: 4366: 4365: 4322: 4320: 4319: 4314: 4312: 4311: 4303: 4296: 4295: 4273: 4271: 4270: 4265: 4263: 4262: 4254: 4247: 4246: 4224: 4222: 4221: 4216: 4204: 4202: 4201: 4196: 4194: 4193: 4168: 4166: 4165: 4160: 4138: 4136: 4135: 4130: 4118: 4116: 4115: 4110: 4095: 4093: 4092: 4087: 4085: 4084: 4083: 4081: 4079: 4074: 4061: 4060: 4059: 4044: 4043: 4035: 4028: 4008: 4007: 4006: 3992: 3991: 3990: 3988: 3986: 3981: 3968: 3967: 3966: 3951: 3950: 3942: 3935: 3921: 3920: 3910: 3905: 3896: 3895: 3887: 3885: 3881: 3879: 3877: 3872: 3856: 3834: 3833: 3832: 3816: 3815: 3814: 3805: 3804: 3796: 3780: 3778: 3777: 3772: 3770: 3766: 3753: 3752: 3751: 3735: 3734: 3733: 3724: 3723: 3715: 3699: 3698: 3697: 3679: 3678: 3668: 3663: 3633: 3632: 3631: 3615: 3614: 3613: 3604: 3603: 3595: 3588: 3580: 3563: 3562: 3561: 3548: 3546: 3535: 3524: 3522: 3521: 3516: 3514: 3513: 3512: 3492: 3490: 3489: 3484: 3482: 3481: 3465: 3463: 3462: 3457: 3455: 3454: 3453: 3433: 3431: 3430: 3425: 3423: 3422: 3417: 3416: 3408: 3401: 3400: 3392: 3386: 3385: 3380: 3379: 3371: 3360: 3358: 3357: 3352: 3350: 3349: 3344: 3343: 3335: 3325:) and relative ( 3324: 3322: 3321: 3316: 3314: 3313: 3305: 3295: 3293: 3292: 3287: 3264: 3262: 3261: 3256: 3254: 3250: 3249: 3248: 3247: 3245: 3244: 3243: 3230: 3229: 3228: 3206: 3193: 3192: 3191: 3188: 3183: 3174: 3173: 3172: 3159: 3154: 3152: 3151: 3150: 3137: 3136: 3131: 3127: 3111: 3096: 3092: 3091: 3072: 3071: 3053: 3051: 3050: 3045: 3043: 3042: 3017: 3015: 3014: 3009: 3007: 3006: 2981: 2979: 2978: 2973: 2971: 2967: 2966: 2965: 2964: 2963: 2941: 2939: 2937: 2932: 2923: 2922: 2909: 2907: 2902: 2890: 2889: 2879: 2866: 2865: 2864: 2862: 2860: 2855: 2843: 2842: 2832: 2831: 2830: 2817: 2812: 2811: 2806: 2802: 2798: 2796: 2794: 2789: 2777: 2776: 2766: 2764: 2759: 2747: 2746: 2736: 2721: 2719: 2717: 2712: 2703: 2702: 2689: 2687: 2682: 2670: 2669: 2659: 2644: 2643: 2634: 2630: 2629: 2628: 2627: 2625: 2624: 2623: 2610: 2609: 2608: 2586: 2573: 2572: 2571: 2569: 2568: 2567: 2554: 2553: 2552: 2530: 2515: 2514: 2513: 2511: 2509: 2504: 2491: 2490: 2489: 2467: 2457: 2456: 2438: 2437: 2419: 2417: 2416: 2411: 2393: 2391: 2390: 2385: 2383: 2379: 2378: 2377: 2376: 2374: 2373: 2372: 2359: 2358: 2357: 2335: 2322: 2321: 2320: 2318: 2317: 2316: 2303: 2302: 2301: 2279: 2263: 2261: 2260: 2259: 2251: 2229: 2205: 2203: 2202: 2197: 2179: 2177: 2176: 2171: 2147: 2145: 2144: 2139: 2137: 2133: 2132: 2115: 2113: 2112: 2107: 2105: 2104: 2103: 2101: 2099: 2094: 2081: 2080: 2079: 2057: 2047: 2043: 2042: 2023: 2022: 2004: 2002: 2001: 1996: 1994: 1993: 1971: 1969: 1968: 1963: 1961: 1960: 1944: 1942: 1941: 1936: 1934: 1933: 1932: 1930: 1929: 1928: 1915: 1914: 1913: 1891: 1880: 1879: 1878: 1876: 1874: 1869: 1856: 1855: 1854: 1832: 1822: 1821: 1799: 1798: 1787: 1786: 1778: 1762: 1761: 1747: 1746: 1745: 1743: 1742: 1741: 1728: 1727: 1726: 1704: 1693: 1691: 1690: 1689: 1681: 1662: 1636: 1634: 1633: 1628: 1610: 1608: 1607: 1602: 1584: 1582: 1581: 1576: 1553: 1551: 1550: 1545: 1543: 1538: 1537: 1522: 1521: 1505: 1503: 1502: 1497: 1495: 1494: 1486: 1480: 1479: 1453:Stephen L. Adler 1450: 1448: 1447: 1442: 1440: 1439: 1431: 1425: 1424: 1399: 1397: 1396: 1391: 1389: 1388: 1372: 1370: 1369: 1364: 1345: 1343: 1342: 1337: 1335: 1334: 1326: 1313: 1311: 1310: 1305: 1303: 1299: 1289: 1288: 1283: 1282: 1274: 1250: 1249: 1239: 1234: 1198: 1197: 1189: 1183: 1175: 1155: 1153: 1142: 1132:particles reads 1131: 1129: 1128: 1123: 1111: 1109: 1108: 1103: 1076: 1074: 1073: 1068: 1065: 1060: 1055: 1054: 1046: 1042: 1025: 1019: 1014: 1009: 1008: 1000: 974: 973: 968: 967: 959: 946: 944: 943: 938: 936: 919: 901: 899: 898: 893: 875: 873: 872: 867: 836: 834: 833: 828: 826: 825: 809: 807: 806: 801: 789: 787: 786: 781: 779: 778: 773: 772: 764: 750: 748: 747: 742: 740: 739: 738: 736: 734: 729: 716: 715: 714: 699: 698: 693: 692: 684: 676: 666: 665: 657: 655: 651: 649: 647: 642: 626: 615: 610: 605: 604: 596: 575: 573: 572: 567: 561: 556: 547: 541: 536: 512: 511: 495: 493: 492: 487: 475: 473: 472: 467: 447: 445: 444: 439: 427: 425: 424: 419: 407: 405: 404: 399: 396: 391: 386: 385: 377: 366: 364: 363: 358: 350: 344: 339: 334: 333: 325: 314: 309: 300: 285: 283: 282: 277: 275: 268: 263: 254: 248: 243: 231: 230: 225: 220: 211: 205: 194: 179: 177: 176: 171: 163: 5691: 5690: 5686: 5685: 5684: 5682: 5681: 5680: 5661: 5660: 5659: 5658: 5602: 5601: 5597: 5541: 5540: 5536: 5486: 5485: 5481: 5425: 5424: 5420: 5372: 5371: 5367: 5309: 5308: 5304: 5256: 5255: 5251: 5242: 5238: 5186: 5185: 5181: 5173: 5171: 5161: 5160: 5156: 5096: 5095: 5091: 5046:Physics Reports 5043: 5042: 5038: 4974: 4973: 4969: 4913: 4912: 4908: 4844: 4843: 4839: 4783: 4782: 4778: 4730: 4729: 4725: 4679: 4678: 4674: 4628: 4627: 4620: 4582: 4581: 4574: 4557: 4522: 4521: 4514: 4509: 4487: 4426: 4413: 4405: 4404: 4357: 4349: 4348: 4341:Brownian motion 4329: 4298: 4287: 4276: 4275: 4249: 4238: 4227: 4226: 4207: 4206: 4185: 4174: 4173: 4141: 4140: 4121: 4120: 4101: 4100: 4062: 4051: 4029: 4019: 3994: 3969: 3958: 3936: 3926: 3912: 3860: 3851: 3850: 3820: 3793: 3788: 3787: 3739: 3712: 3685: 3684: 3680: 3670: 3619: 3592: 3549: 3539: 3529: 3528: 3500: 3495: 3494: 3473: 3468: 3467: 3441: 3436: 3435: 3405: 3368: 3363: 3362: 3332: 3327: 3326: 3298: 3297: 3278: 3277: 3274: 3235: 3231: 3220: 3207: 3197: 3164: 3160: 3142: 3138: 3117: 3113: 3112: 3102: 3101: 3097: 3085: 3063: 3058: 3057: 3034: 3020: 3019: 2998: 2987: 2986: 2955: 2914: 2910: 2881: 2880: 2870: 2834: 2833: 2822: 2818: 2768: 2767: 2738: 2737: 2728: 2724: 2723: 2694: 2690: 2661: 2660: 2650: 2649: 2645: 2615: 2611: 2600: 2587: 2577: 2559: 2555: 2544: 2531: 2521: 2520: 2516: 2492: 2481: 2468: 2458: 2429: 2424: 2423: 2396: 2395: 2364: 2360: 2349: 2336: 2326: 2308: 2304: 2293: 2280: 2270: 2269: 2265: 2246: 2233: 2208: 2207: 2182: 2181: 2153: 2152: 2126: 2121: 2120: 2082: 2071: 2058: 2048: 2036: 2014: 2009: 2008: 1985: 1974: 1973: 1950: 1949: 1920: 1916: 1905: 1892: 1882: 1857: 1846: 1833: 1823: 1775: 1753: 1733: 1729: 1718: 1705: 1695: 1676: 1666: 1641: 1640: 1613: 1612: 1587: 1586: 1567: 1566: 1560: 1526: 1513: 1508: 1507: 1481: 1468: 1457: 1456: 1426: 1413: 1402: 1401: 1380: 1375: 1374: 1355: 1354: 1319: 1318: 1271: 1255: 1251: 1241: 1146: 1136: 1135: 1114: 1113: 1082: 1081: 956: 951: 950: 904: 903: 878: 877: 855: 854: 817: 812: 811: 792: 791: 761: 756: 755: 717: 706: 681: 677: 667: 630: 621: 620: 588: 587: 503: 498: 497: 478: 477: 458: 457: 430: 429: 410: 409: 369: 368: 291: 290: 206: 185: 184: 154: 153: 149: 121: 45: 29:collapse theory 17: 12: 11: 5: 5689: 5687: 5679: 5678: 5673: 5663: 5662: 5657: 5656: 5611:(12): 120402. 5595: 5550:(20): 200403. 5534: 5499:(2): 119–130. 5479: 5434:(4): 821–840. 5418: 5365: 5302: 5249: 5236: 5179: 5154: 5109:(2): 471–527. 5089: 5036: 4983:(17): 170404. 4967: 4906: 4837: 4776: 4723: 4688:(5): 581–600. 4672: 4618: 4572: 4531:(2): 470–491. 4511: 4510: 4508: 4505: 4504: 4503: 4498: 4493: 4486: 4483: 4482: 4481: 4469: 4466: 4463: 4449: 4446: 4441: 4436: 4433: 4430: 4423: 4420: 4416: 4412: 4390: 4385: 4381: 4377: 4374: 4370: 4364: 4360: 4356: 4337: 4328: 4327:Other features 4325: 4310: 4307: 4302: 4294: 4290: 4286: 4283: 4261: 4258: 4253: 4245: 4241: 4237: 4234: 4214: 4192: 4188: 4184: 4181: 4158: 4154: 4151: 4148: 4128: 4108: 4078: 4073: 4069: 4065: 4058: 4054: 4050: 4047: 4041: 4038: 4032: 4026: 4022: 4017: 4014: 4011: 4005: 4002: 3997: 3985: 3980: 3976: 3972: 3965: 3961: 3957: 3954: 3948: 3945: 3939: 3933: 3929: 3924: 3919: 3915: 3909: 3904: 3900: 3893: 3890: 3884: 3876: 3871: 3867: 3863: 3859: 3854: 3849: 3846: 3843: 3840: 3837: 3831: 3828: 3823: 3819: 3813: 3810: 3802: 3799: 3769: 3765: 3762: 3759: 3756: 3750: 3747: 3742: 3738: 3732: 3729: 3721: 3718: 3711: 3708: 3705: 3702: 3696: 3693: 3688: 3683: 3677: 3673: 3667: 3662: 3659: 3656: 3652: 3648: 3645: 3642: 3639: 3636: 3630: 3627: 3622: 3618: 3612: 3609: 3601: 3598: 3591: 3586: 3583: 3578: 3575: 3572: 3569: 3566: 3560: 3557: 3552: 3545: 3542: 3538: 3511: 3508: 3503: 3480: 3476: 3452: 3449: 3444: 3421: 3414: 3411: 3404: 3398: 3395: 3389: 3384: 3377: 3374: 3348: 3341: 3338: 3311: 3308: 3285: 3273: 3270: 3253: 3242: 3238: 3234: 3227: 3223: 3219: 3216: 3213: 3210: 3204: 3200: 3196: 3187: 3182: 3178: 3171: 3167: 3163: 3157: 3149: 3145: 3141: 3135: 3130: 3126: 3123: 3120: 3116: 3109: 3105: 3100: 3095: 3090: 3084: 3081: 3078: 3075: 3070: 3066: 3041: 3037: 3033: 3030: 3027: 3005: 3001: 2997: 2994: 2970: 2962: 2958: 2954: 2951: 2948: 2945: 2936: 2931: 2927: 2921: 2917: 2913: 2906: 2901: 2897: 2893: 2888: 2884: 2877: 2873: 2869: 2859: 2854: 2850: 2846: 2841: 2837: 2829: 2825: 2821: 2815: 2810: 2805: 2801: 2793: 2788: 2784: 2780: 2775: 2771: 2763: 2758: 2754: 2750: 2745: 2741: 2734: 2731: 2727: 2716: 2711: 2707: 2701: 2697: 2693: 2686: 2681: 2677: 2673: 2668: 2664: 2657: 2653: 2648: 2642: 2637: 2633: 2622: 2618: 2614: 2607: 2603: 2599: 2596: 2593: 2590: 2584: 2580: 2576: 2566: 2562: 2558: 2551: 2547: 2543: 2540: 2537: 2534: 2528: 2524: 2519: 2508: 2503: 2499: 2495: 2488: 2484: 2480: 2477: 2474: 2471: 2465: 2461: 2455: 2450: 2447: 2444: 2441: 2436: 2432: 2409: 2406: 2403: 2382: 2371: 2367: 2363: 2356: 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181: 169: 166: 162: 148: 145: 120: 117: 116: 115: 112: 109: 102: 44: 41: 15: 13: 10: 9: 6: 4: 3: 2: 5688: 5677: 5674: 5672: 5669: 5668: 5666: 5652: 5648: 5644: 5640: 5636: 5632: 5628: 5624: 5619: 5614: 5610: 5606: 5599: 5596: 5591: 5587: 5583: 5579: 5575: 5571: 5567: 5563: 5558: 5553: 5549: 5545: 5538: 5535: 5530: 5526: 5522: 5518: 5514: 5510: 5506: 5502: 5498: 5494: 5490: 5483: 5480: 5475: 5471: 5467: 5463: 5459: 5455: 5451: 5447: 5442: 5437: 5433: 5429: 5422: 5419: 5414: 5410: 5406: 5402: 5398: 5394: 5389: 5384: 5380: 5376: 5369: 5366: 5361: 5357: 5352: 5347: 5343: 5339: 5335: 5331: 5326: 5321: 5318:(6): 062135. 5317: 5313: 5306: 5303: 5298: 5294: 5290: 5286: 5282: 5278: 5273: 5268: 5265:(5): 052121. 5264: 5260: 5253: 5250: 5246: 5240: 5237: 5232: 5228: 5224: 5220: 5216: 5212: 5207: 5202: 5198: 5194: 5190: 5183: 5180: 5169: 5165: 5158: 5155: 5150: 5146: 5142: 5138: 5134: 5130: 5126: 5122: 5117: 5112: 5108: 5104: 5100: 5093: 5090: 5085: 5081: 5077: 5073: 5069: 5065: 5060: 5055: 5051: 5047: 5040: 5037: 5032: 5028: 5024: 5020: 5016: 5012: 5008: 5004: 5000: 4996: 4991: 4986: 4982: 4978: 4971: 4968: 4963: 4959: 4955: 4951: 4947: 4943: 4939: 4935: 4930: 4925: 4922:(2): 022108. 4921: 4917: 4910: 4907: 4902: 4898: 4894: 4890: 4886: 4882: 4878: 4874: 4870: 4866: 4861: 4856: 4853:(5): 050403. 4852: 4848: 4841: 4838: 4833: 4829: 4825: 4821: 4817: 4813: 4809: 4805: 4800: 4795: 4792:(1): 012116. 4791: 4787: 4780: 4777: 4772: 4768: 4764: 4760: 4756: 4752: 4747: 4742: 4738: 4734: 4727: 4724: 4719: 4715: 4711: 4707: 4703: 4699: 4695: 4691: 4687: 4683: 4676: 4673: 4668: 4664: 4660: 4656: 4652: 4648: 4644: 4640: 4636: 4632: 4625: 4623: 4619: 4614: 4610: 4606: 4602: 4598: 4594: 4590: 4586: 4579: 4577: 4573: 4568: 4562: 4554: 4550: 4546: 4542: 4538: 4534: 4530: 4526: 4519: 4517: 4513: 4506: 4502: 4499: 4497: 4494: 4492: 4489: 4488: 4484: 4479: 4474: 4470: 4467: 4464: 4447: 4444: 4421: 4418: 4414: 4410: 4388: 4383: 4379: 4375: 4372: 4368: 4362: 4354: 4346: 4342: 4338: 4335: 4331: 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2934: 2929: 2925: 2919: 2915: 2911: 2904: 2899: 2895: 2891: 2886: 2882: 2875: 2871: 2867: 2857: 2852: 2848: 2844: 2839: 2835: 2827: 2823: 2819: 2813: 2808: 2803: 2799: 2791: 2786: 2782: 2778: 2773: 2769: 2761: 2756: 2752: 2748: 2743: 2739: 2732: 2729: 2725: 2714: 2709: 2705: 2699: 2695: 2691: 2684: 2679: 2675: 2671: 2666: 2662: 2655: 2651: 2646: 2635: 2631: 2620: 2616: 2612: 2605: 2597: 2594: 2591: 2582: 2578: 2574: 2564: 2560: 2556: 2549: 2541: 2538: 2535: 2526: 2522: 2517: 2506: 2501: 2497: 2493: 2486: 2478: 2475: 2472: 2463: 2459: 2448: 2442: 2434: 2430: 2421: 2407: 2404: 2401: 2380: 2369: 2365: 2361: 2354: 2346: 2343: 2340: 2331: 2327: 2323: 2313: 2309: 2305: 2298: 2290: 2287: 2284: 2275: 2271: 2266: 2255: 2252: 2243: 2240: 2234: 2230: 2225: 2219: 2213: 2193: 2190: 2187: 2167: 2164: 2161: 2158: 2149: 2134: 2117: 2096: 2091: 2087: 2083: 2076: 2068: 2065: 2062: 2053: 2049: 2044: 2033: 2027: 2019: 2015: 2006: 1990: 1986: 1982: 1979: 1946: 1925: 1921: 1917: 1910: 1902: 1899: 1896: 1887: 1883: 1871: 1866: 1862: 1858: 1851: 1843: 1840: 1837: 1828: 1824: 1813: 1807: 1801: 1795: 1792: 1789: 1779: 1772: 1766: 1758: 1754: 1738: 1734: 1730: 1723: 1715: 1712: 1709: 1700: 1696: 1685: 1682: 1673: 1670: 1663: 1658: 1652: 1646: 1638: 1624: 1621: 1618: 1598: 1595: 1592: 1572: 1563: 1557: 1555: 1534: 1531: 1527: 1523: 1518: 1514: 1491: 1488: 1476: 1473: 1469: 1465: 1462: 1454: 1436: 1433: 1421: 1418: 1414: 1410: 1407: 1385: 1381: 1360: 1351: 1349: 1327: 1315: 1300: 1293: 1285: 1275: 1268: 1262: 1256: 1252: 1246: 1242: 1236: 1231: 1228: 1225: 1221: 1217: 1208: 1202: 1199: 1190: 1176: 1171: 1168: 1162: 1156: 1150: 1147: 1143: 1133: 1119: 1099: 1096: 1093: 1090: 1087: 1078: 1062: 1057: 1047: 1035: 1026: 1016: 1011: 1001: 993: 990: 987: 984: 978: 970: 960: 948: 929: 920: 912: 909: 889: 886: 883: 863: 860: 852: 844: 840: 839: 838: 822: 818: 797: 775: 765: 752: 731: 726: 722: 718: 711: 703: 700: 695: 685: 672: 668: 661: 658: 652: 644: 639: 635: 631: 627: 622: 617: 612: 607: 597: 582: 578: 558: 553: 549: 538: 533: 529: 522: 516: 508: 504: 483: 463: 455: 451: 450: 449: 435: 415: 393: 388: 378: 351: 341: 336: 326: 319: 311: 306: 302: 287: 265: 260: 256: 245: 240: 236: 222: 217: 213: 195: 164: 151: 150: 146: 144: 142: 138: 134: 130: 126: 125:wave function 118: 113: 110: 107: 103: 100: 96: 95: 94: 91: 89: 84: 80: 78: 74: 70: 65: 61: 57: 53: 49: 42: 40: 38: 34: 30: 26: 22: 5608: 5604: 5598: 5547: 5543: 5537: 5496: 5492: 5482: 5431: 5427: 5421: 5378: 5374: 5368: 5315: 5311: 5305: 5262: 5259:Phys. Rev. A 5258: 5252: 5244: 5239: 5196: 5192: 5182: 5172:, retrieved 5167: 5157: 5106: 5102: 5092: 5049: 5045: 5039: 4980: 4976: 4970: 4919: 4915: 4909: 4850: 4846: 4840: 4789: 4785: 4779: 4736: 4732: 4726: 4685: 4681: 4675: 4634: 4630: 4591:(1): 78–89. 4588: 4584: 4561:cite journal 4528: 4524: 4171: 4098: 3786: 3783: 3527: 3275: 3267: 3056: 2984: 2422: 2150: 2118: 2007: 1947: 1639: 1564: 1561: 1352: 1316: 1134: 1079: 949: 848: 753: 586: 288: 183: 122: 92: 81: 46: 24: 20: 18: 5351:2434/314893 4473:decoherence 135:, like the 119:Description 5665:Categories 5618:1512.07244 5174:2020-05-26 4507:References 1348:commutator 5651:206271698 5557:1408.1273 5521:0010-3616 5466:1572-9613 5325:1408.6115 5297:118401637 5272:1110.4495 5231:1751-8113 5149:119261020 5141:0034-6861 5116:1204.4325 5084:119076099 5015:0031-9007 4990:1204.4348 4962:119216571 4954:1050-2947 4929:1112.5065 4885:0031-9007 4860:0907.1615 4832:119297164 4824:1050-2947 4799:0901.1254 4763:0305-4470 4710:0001-7701 4659:0556-2791 4445:− 4419:− 4411:≃ 4359:ℏ 4355:λ 4306:− 4282:Λ 4257:− 4233:Λ 4213:λ 4183:≃ 4157:λ 4147:Λ 4127:λ 4107:Λ 4046:− 4040:^ 4025:− 3996:ρ 3953:− 3947:^ 3932:− 3908:∞ 3903:∞ 3899:∫ 3862:π 3822:ρ 3801:^ 3741:ρ 3720:^ 3710:− 3687:ρ 3672:λ 3651:∑ 3647:− 3621:ρ 3600:^ 3585:ℏ 3577:− 3551:ρ 3502:ρ 3413:^ 3397:^ 3376:^ 3340:^ 3310:^ 3237:σ 3215:− 3203:− 3156:− 3144:σ 3108:− 3083:≃ 3065:ψ 3032:≫ 2996:≪ 2993:σ 2950:− 2916:σ 2883:σ 2876:− 2836:σ 2814:− 2770:σ 2749:− 2740:σ 2696:σ 2663:σ 2656:− 2617:σ 2595:− 2583:− 2561:σ 2527:− 2476:− 2464:− 2431:ψ 2366:σ 2344:− 2332:− 2310:σ 2276:− 2244:σ 2241:π 2214:ψ 2165:− 2066:− 2054:− 2034:≃ 2016:ψ 1983:≫ 1980:σ 1922:σ 1900:− 1888:− 1841:− 1829:− 1802:ψ 1783:^ 1755:ψ 1750:⟶ 1735:σ 1713:− 1701:− 1674:σ 1671:π 1647:ψ 1573:σ 1532:− 1489:− 1474:− 1463:λ 1434:− 1419:− 1408:λ 1361:λ 1331:^ 1294:ρ 1279:^ 1269:− 1257:ρ 1243:λ 1222:∑ 1218:− 1203:ρ 1194:^ 1180:ℏ 1172:− 1157:ρ 1094:λ 1091:− 1051:^ 1036:ψ 1033:⟨ 1030:⟩ 1027:ψ 1005:^ 988:∫ 985:≡ 979:ρ 964:^ 930:ψ 927:⟨ 924:⟩ 921:ψ 910:ρ 884:λ 769:^ 701:− 689:^ 673:− 632:π 601:^ 564:⟩ 550:ψ 530:ψ 526:⟨ 464:λ 382:^ 355:⟩ 352:ψ 330:^ 317:⟩ 303:ψ 271:⟩ 257:ψ 237:ψ 233:⟨ 228:⟩ 214:ψ 202:→ 199:⟩ 196:ψ 168:⟩ 165:ψ 99:CSL model 88:Born rule 5643:27058061 5590:14535901 5582:25432028 5529:55220796 5474:13923422 5413:16123332 5360:52232273 5243:It has " 5031:16746767 5023:22680843 4901:25021141 4893:19792469 4771:37142667 4718:44038399 4485:See also 4478:Lindblad 3094:′ 2420:one has 2135:′ 2045:′ 1558:Examples 581:Gaussian 5623:Bibcode 5562:Bibcode 5501:Bibcode 5446:Bibcode 5393:Bibcode 5330:Bibcode 5277:Bibcode 5247:", see 5211:Bibcode 5121:Bibcode 5064:Bibcode 4995:Bibcode 4934:Bibcode 4865:Bibcode 4804:Bibcode 4690:Bibcode 4667:9902248 4639:Bibcode 4613:9903779 4593:Bibcode 4553:9957165 4533:Bibcode 454:Poisson 5649:  5641:  5588:  5580:  5527:  5519:  5472:  5464:  5411:  5358:  5295:  5229:  5147:  5139:  5082:  5029:  5021:  5013:  4960:  4952:  4899:  4891:  4883:  4830:  4822:  4769:  4761:  4716:  4708:  4665:  4657:  4611:  4551:  3784:where 2119:where 1948:where 1317:where 754:where 289:where 5647:S2CID 5613:arXiv 5586:S2CID 5552:arXiv 5525:S2CID 5470:S2CID 5436:arXiv 5409:S2CID 5383:arXiv 5356:S2CID 5320:arXiv 5293:S2CID 5267:arXiv 5201:arXiv 5145:S2CID 5111:arXiv 5080:S2CID 5054:arXiv 5027:S2CID 4985:arXiv 4958:S2CID 4924:arXiv 4897:S2CID 4855:arXiv 4828:S2CID 4794:arXiv 4767:S2CID 4741:arXiv 4714:S2CID 583:form: 5639:PMID 5578:PMID 5517:ISSN 5462:ISSN 5227:ISSN 5137:ISSN 5019:PMID 5011:ISSN 4950:ISSN 4889:PMID 4881:ISSN 4820:ISSN 4759:ISSN 4706:ISSN 4663:PMID 4655:ISSN 4609:PMID 4567:link 4549:PMID 4274:and 2180:and 104:the 97:the 19:The 5631:doi 5609:116 5570:doi 5548:113 5509:doi 5454:doi 5432:125 5401:doi 5379:462 5346:hdl 5338:doi 5285:doi 5219:doi 5129:doi 5072:doi 5050:379 5003:doi 4981:108 4942:doi 4873:doi 4851:103 4812:doi 4751:doi 4698:doi 4647:doi 4601:doi 4541:doi 496:is 31:in 25:GRW 5667:: 5645:. 5637:. 5629:. 5621:. 5607:. 5584:. 5576:. 5568:. 5560:. 5546:. 5523:. 5515:. 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5332:: 5322:: 5299:. 5287:: 5279:: 5269:: 5233:. 5221:: 5213:: 5203:: 5151:. 5131:: 5123:: 5113:: 5086:. 5074:: 5066:: 5056:: 5033:. 5005:: 4997:: 4987:: 4964:. 4944:: 4936:: 4926:: 4903:. 4875:: 4867:: 4857:: 4834:. 4814:: 4806:: 4796:: 4773:. 4753:: 4743:: 4720:. 4700:: 4692:: 4669:. 4649:: 4641:: 4615:. 4603:: 4595:: 4569:) 4555:. 4543:: 4535:: 4448:1 4440:s 4435:g 4432:r 4429:e 4389:2 4384:C 4380:r 4376:m 4373:4 4369:/ 4363:2 4309:1 4301:s 4285:= 4260:1 4252:s 4244:7 4236:= 4180:N 4153:N 4150:= 4077:2 4072:C 4068:r 4064:2 4057:2 4053:) 4049:x 4037:Q 4031:( 4021:e 4016:) 4013:t 4010:( 4004:M 4001:C 3984:2 3979:C 3975:r 3971:2 3964:2 3960:) 3956:x 3944:Q 3938:( 3928:e 3923:x 3918:3 3914:d 3892:2 3889:3 3883:) 3875:2 3870:C 3866:r 3858:1 3853:( 3848:= 3845:] 3842:) 3839:t 3836:( 3830:M 3827:C 3818:[ 3812:M 3809:C 3798:T 3768:) 3764:] 3761:) 3758:t 3755:( 3749:M 3746:C 3737:[ 3731:M 3728:C 3717:T 3707:) 3704:t 3701:( 3695:M 3692:C 3682:( 3676:i 3666:N 3661:1 3658:= 3655:i 3644:] 3641:) 3638:t 3635:( 3629:M 3626:C 3617:, 3611:M 3608:C 3597:H 3590:[ 3582:i 3574:= 3571:) 3568:t 3565:( 3559:M 3556:C 3544:t 3541:d 3537:d 3510:M 3507:C 3479:r 3475:H 3451:M 3448:C 3443:H 3420:i 3410:r 3403:+ 3394:Q 3388:= 3383:i 3373:q 3347:i 3337:r 3307:Q 3284:N 3252:] 3241:2 3233:2 3226:2 3222:) 3218:a 3212:x 3209:( 3199:e 3195:+ 3186:2 3181:C 3177:r 3170:2 3166:a 3162:2 3148:2 3140:2 3134:2 3129:) 3125:a 3122:+ 3119:x 3115:( 3104:e 3099:[ 3089:N 3080:) 3077:x 3074:( 3069:a 3040:C 3036:r 3029:a 3026:2 3004:C 3000:r 2969:] 2961:2 2957:) 2953:a 2947:x 2944:( 2935:2 2930:C 2926:r 2920:2 2912:2 2905:2 2900:C 2896:r 2892:+ 2887:2 2872:e 2868:+ 2858:2 2853:C 2849:r 2845:+ 2840:2 2828:2 2824:a 2820:2 2809:2 2804:) 2800:a 2792:2 2787:C 2783:r 2779:+ 2774:2 2762:2 2757:C 2753:r 2744:2 2733:+ 2730:x 2726:( 2715:2 2710:C 2706:r 2700:2 2692:2 2685:2 2680:C 2676:r 2672:+ 2667:2 2652:e 2647:[ 2641:N 2636:= 2632:] 2621:2 2613:2 2606:2 2602:) 2598:a 2592:x 2589:( 2579:e 2575:+ 2565:2 2557:2 2550:2 2546:) 2542:a 2539:+ 2536:x 2533:( 2523:e 2518:[ 2507:2 2502:C 2498:r 2494:2 2487:2 2483:) 2479:a 2473:x 2470:( 2460:e 2454:N 2449:= 2446:) 2443:x 2440:( 2435:a 2408:a 2405:= 2402:x 2381:] 2370:2 2362:2 2355:2 2351:) 2347:a 2341:x 2338:( 2328:e 2324:+ 2314:2 2306:2 2299:2 2295:) 2291:a 2288:+ 2285:x 2282:( 2272:e 2267:[ 2256:4 2253:1 2248:) 2238:( 2235:2 2231:1 2226:= 2223:) 2220:x 2217:( 2194:a 2191:= 2188:x 2168:a 2162:= 2159:x 2130:N 2097:2 2092:C 2088:r 2084:2 2077:2 2073:) 2069:a 2063:x 2060:( 2050:e 2040:N 2031:) 2028:x 2025:( 2020:a 1991:C 1987:r 1958:N 1926:2 1918:2 1911:2 1907:) 1903:a 1897:x 1894:( 1884:e 1872:2 1867:C 1863:r 1859:2 1852:2 1848:) 1844:a 1838:x 1835:( 1825:e 1819:N 1814:= 1811:) 1808:x 1805:( 1796:a 1793:= 1790:x 1780:L 1773:= 1770:) 1767:x 1764:( 1759:a 1739:2 1731:2 1724:2 1720:) 1716:a 1710:x 1707:( 1697:e 1686:4 1683:1 1678:) 1668:( 1664:1 1659:= 1656:) 1653:x 1650:( 1625:a 1622:= 1619:x 1599:a 1596:= 1593:x 1541:m 1535:7 1524:= 1519:C 1515:r 1492:1 1484:s 1477:8 1466:= 1437:1 1429:s 1411:= 1386:C 1382:r 1328:H 1301:) 1297:] 1291:[ 1286:i 1276:T 1266:) 1263:t 1260:( 1253:( 1247:i 1237:N 1232:1 1229:= 1226:i 1215:] 1212:) 1209:t 1206:( 1200:, 1191:H 1185:[ 1177:i 1169:= 1166:) 1163:t 1160:( 1151:t 1148:d 1144:d 1120:N 1100:t 1097:d 1088:1 1063:i 1058:x 1048:L 1040:| 1023:| 1017:i 1012:x 1002:L 994:x 991:d 982:] 976:[ 971:i 961:T 934:| 917:| 913:= 890:t 887:d 864:t 861:d 845:. 823:C 819:r 798:i 776:i 766:q 732:2 727:C 723:r 719:2 712:2 708:) 704:x 696:i 686:q 679:( 669:e 662:4 659:3 653:) 645:2 640:C 636:r 628:1 623:( 618:= 613:i 608:x 598:L 576:. 559:i 554:x 545:| 539:i 534:x 523:= 520:) 517:x 514:( 509:i 505:P 484:x 436:x 416:i 394:i 389:x 379:L 348:| 342:i 337:x 327:L 320:= 312:i 307:x 298:| 266:i 261:x 252:| 246:i 241:x 223:i 218:x 209:| 192:| 161:| 23:(

Index

collapse theory
quantum mechanics
Giancarlo Ghirardi
Quantum mechanics
Schrödinger equation
wave packet reduction
Copenhagen interpretation
wave function collapse
Schrödinger’s cat paradox
classical mechanics
measurement problem
Collapse theories
Born rule
CSL model
Diósi–Penrose model
wave function
Interpretations of quantum mechanics
hidden variable theories
de Broglie–Bohm theory
collapse theories
Poisson
Gaussian
Schrödinger equation
statistical operator
commutator
Stephen L. Adler
quantum mechanics
Brownian motion
energy conservation
decoherence

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