John Michael Cornwall (born 19 August 1934 in Denver, Colorado) is an American theoretical physicist who does research on elementary particle physics and quantum field theory as well as geophysics and physics of near-space. He is known for the Pinch Technique. 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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| - جون ميخائيل كورنوال (ar)
- John Cornwall (de)
- John Michael Cornwall (en)
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| - جون ميخائيل كورنوال (بالإنجليزية: John Cornwall) هو فيزيائي أمريكي، ولد في 19 أغسطس 1934 في دنفر في الولايات المتحدة. (ar)
- John Michael Cornwall (* 19. August 1934 in Denver, Colorado) ist ein US-amerikanischer theoretischer Physiker, der sich mit Elementarteilchenphysik und Quantenfeldtheorie befasst sowie mit Geophysik und Physik des nahen Weltraums. Cornwall publizierte 1973 mit Richard E. Norton eine der frühesten Arbeiten über dynamischen Symmetriebruch in Yang-Mills-Theorien Daneben befasst er sich mit Plasmaphysik im nahen Weltraum (Van-Allen-Gürtel, Polarlichter). (de)
- John Michael Cornwall (born 19 August 1934 in Denver, Colorado) is an American theoretical physicist who does research on elementary particle physics and quantum field theory as well as geophysics and physics of near-space. He is known for the Pinch Technique. 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. (en)
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| - جون ميخائيل كورنوال (بالإنجليزية: John Cornwall) هو فيزيائي أمريكي، ولد في 19 أغسطس 1934 في دنفر في الولايات المتحدة. (ar)
- John Michael Cornwall (* 19. August 1934 in Denver, Colorado) ist ein US-amerikanischer theoretischer Physiker, der sich mit Elementarteilchenphysik und Quantenfeldtheorie befasst sowie mit Geophysik und Physik des nahen Weltraums. Cornwall studierte an der Harvard University mit dem Bachelor-Abschluss 1956 und der University of Denver mit dem Master-Abschluss 1959. Er wurde 1962 an der University of California, Berkeley, promoviert. Als Post-Doktorand war er am Caltech und von 1963 bis 1965 am Institute for Advanced Study. 1965 wurde er Assistant Professor und 1974 Professor an der University of California, Los Angeles (UCLA). Cornwall befasst sich vor allem mit Quantenchromodynamik (QCD), in der er nichtstörungstheoretische Methoden entwickelte, mit der eichinvariante Off-Shell Greenfunktionen aus der S-Matrix gewonnen werden können (Pinch-Technik, von ihm 1981 eingeführt). Er wandte dies bei der Untersuchung der QCD und anderer Yang-Mills-Theorien bei hohen Temperaturen und im frühen Universum an (Magnetische Monopole, Entstehung der Baryonenasymmetrie). Cornwall publizierte 1973 mit Richard E. Norton eine der frühesten Arbeiten über dynamischen Symmetriebruch in Yang-Mills-Theorien Daneben befasst er sich mit Plasmaphysik im nahen Weltraum (Van-Allen-Gürtel, Polarlichter). Er war Berater der Mitre Corporation und der Aerospace Corporation in El Segundo (1962–1993) und Mitglied der JASON Defense Advisory Group. Er war im National Security Advisory Comitee des Lawrence Livermore National Laboratory (ab 1989), Berater der NASA (1975) und Professor an der Graduate School der RAND Corporation. Seit 2002 war er Berater des Center for Defence Information. Von 1967 bis 1969 war er Sloan Research Fellow und 1968/69 Gastwissenschaftler am Niels-Bohr-Institut in Kopenhagen. 1987/88 war er Gastprofessor am Massachusetts Institute of Technology und 1989 an der Rockefeller University. Er ist Fellow der American Physical Society (2005), der New York Academy of Sciences, der American Geophysical Union und der American Association for the Advancement of Science. (de)
- John Michael Cornwall (born 19 August 1934 in Denver, Colorado) is an American theoretical physicist who does research on elementary particle physics and quantum field theory as well as geophysics and physics of near-space. He is known for the Pinch Technique. 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 University of California, Berkeley with a doctorate under the supervision of Malvin Ruderman. 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 University of California, Los Angeles (UCLA) he became in 1965 an assistant professor and in 1974 a full professor. 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 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. 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. He was an advisor to the Space Sciences Laboratory of the Aerospace Corporation in El Segundo (1962–1993) and to the Institute for Defense Analyses in Alexandria (2002–2015), as well as to the National Aeronautics and Space Administration (NASA). He was a faculty member of the Pardee RAND Graduate School of Public Policy (1999–2005) 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 Livermore National Laboratory (1989–present), and is a long-term member of the JASON Advisory Group. He was from 1967 to 1969 a Sloan Fellow and from 1968 to 1969 a visiting scientist at the Niels Bohr Institute in Copenhagen. He was a visiting professor for the academic year 1987–1988 at the Massachusetts Institute of Technology and in 1989 at Rockefeller University. 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. (en)
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