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gauge-invariant mass generation, lead to confinement and other non-perturbative phenomena. He has also written some 40 papers on space plasmas such as the aurora, the ionosphere, and the magnetospheric ring current, leading among other things to a detailed understanding of the dynamical role of electromagnetic cyclotron instabilities in the magnetosphere.
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Cornwall invented the Pinch
Technique for calculating gauge-invariant off-shell Green's functions for QCD and other Yang-Mills theories, showing how a dynamical gauge-invariant mass arises for QCD gluons and how such gluons, with the long-range pure-gauge fields that necessarily accompany
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He was an advisor to the Space
Sciences Laboratory of the Aerospace Corporation in El Segundo (1962β1993) and to the Institute for Defense Analyses in Alexandria (2002β2015), as well as to the National Aeronautics and Space Administration (NASA). He was a faculty member of the
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Cornwall published with
Richard E. Norton in 1973 one of the earliest papers on dynamic symmetry breaking in Yang-Mills theories. In the later part of his career he has worked on non-perturbative quantum chromodynamics.
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He is a Fellow of the
American Physical Society (2005), the New York Academy of Sciences, the American Geophysical Union, and the American Association for the Advancement of Science.
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Cornwall graduated from
Harvard University with a bachelor's degree in 1956 and from the University of Denver with a master's degree in 1959. He graduated in 1962 from the
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in
Copenhagen. He was a visiting professor for the academic year 1987β1988 at the Massachusetts Institute of Technology and in 1989 at Rockefeller University.
45:. Cornwall was a postdoctoral fellow at the California Institute of Technology (Caltech) and from 1963 to 1965 at the Institute for Advanced Study. At the
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Oral history interview transcript with John
Cornwall and Malvin Ruderman in June 2004, American Institute of Physics, Niels Bohr Library & Archives
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67:(1999β2005) and a member of the Defense Science Board (1992-1994). For some years he has been a member and now chairman of an advisory board at
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with
Richard E. Norton: On the formalism of relativistic many body theory, Annals of Physics, Vol. 91, 1975, p. 106
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with G. Tiktopoulos: Infrared
Behavior of non-abelian gauge theories, Phys. Rev. D, vol. 13, 1976, pp. 3370-3397
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with G. Tiktopoulos: On-shell asymptotics of non-abelian gauge fields, Phys. Rev. Lett., vol. 35, 1975, p. 338
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119:, E. Tomboulis: "Effective action for composite operators", Physical Review D, vol. 10, 1974, pp. 2428-2445
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Pilaftsis, Apostolos (1997). "Generalized Pinch
Technique and the Background Field Method in General Gauges".
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Dynamical mass generation in continuum quantum chromodynamics, Phys. Rev. D, Vol. 26, 1982, p. 1453
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Cornwall, J. M.; Norton, R. E. (1973). "Spontaneous symmetry breaking without scalar mesons".
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as well as geophysics and physics of near-space. He is known for the Pinch Technique.
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Cornwall, J. M. (1974). "Spontaneous symmetry breaking without scalar mesons. II".
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363:(1973). "Dynamical Model of Spontaneously Broken Gauge Symmetries".
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Fellows of the American Association for the Advancement of Science
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The pinch technique and applications to non-abelian gauge theories
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460:University of California, Los Angeles faculty
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147:; part 2, Phys. Rev. D, Vol. 15, 1977, 2397
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22:(born 19 August 1934 in
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285:"John Michael Cornwall"
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93:Selected publications
20:John Michael Cornwall
399:"APS Fellow Archive"
84:Niels Bohr Institute
73:JASON Advisory Group
32:quantum field theory
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