Prof. Jean ZinnJustin
CEA, IRFU and Institut de Physique Théorique, Centre de Saclay, F91191 GifsurYvette, France
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Featured Author: Jean ZinnJustin
Dr. ZinnJustin (b. 1943) attended École Polytechnique for his undergraduate degree, graduating in 1964. He continued his research under Marcel Froissart at the University of Orsay, earning a Ph.D. in 1968. While ZinnJustin has had a permanent position with the CEASaclay theory group, he has also held visiting positions as SUNY StonyBrook, CERN, Princeton, Harvard, and MIT.
ZinnJustin is a recipient of the GentnerKastler prize and the HumboldtGay Lussac award. He has been the head editor of publications including Journal de Physique, and the Institute of Physics Journal of Physics A, along with membership on the editorial boards of other journals. He has directed the Les Houches summer school, the Theoretical Institute and subsequently the Institute of Research into the Fundamental Laws of the Universe (formerly, Dapnia), both in Saclay.
ZinnJustin's research in quantum physics looks principally at quantum field theory and the renormalization group, especially at how they apply to particle physics and the statistical physics of phase transitions. In collaboration with B.W. Lee he presented the first proof of the renormalizability of gauge theories in the symmetry broken phase with respect to weak interactions.
Scholarpedia articles:
 Gauge invariance (2008), Scholarpedia, 3(12):8287
 Path integral (2009), Scholarpedia, 4(2):8674
 ZinnJustin equation (2009), Scholarpedia, 4(1):7120
 Critical_Phenomena:_field_theoretical_approach (in progress), Scholarpedia x(x):xxxx
(Author profile by Leo Trottier)
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Jean ZinnJustin IRFU and IPhT, CEA Saclay, France
EducationJean ZinnJustin graduated from Ecole Polytechnique (France) in 1964 and did his PhD thesis under the supervision of Marcel Froissart (University of Orsay, 1968). PositionsHe has a permanent position in the CEASaclay theory group since 1966, was postdoc in StonyBrook (19711972), fellow at CERN, lecturer in Princeton and Harvard (Loeb lecturer) and Harris scholar at MIT. He has directed Les Houches school of Physics, the CEASaclay theoretical Institute (IPhT) and more recently the CEA Institute of Research into the fundamental Laws of the Universe (IRFU) also in Saclay. He has been parttime lecturer at Ecole Normale Supérieure de Paris, Université de CergyPontoise and then Université de Paris 7. Presently, he is parttime professor at Shanghai University. He has also been the head editor of Journal de Physique, Journal of Physics A (IOP) and still belongs to the Board of the New Journal of Physics, Progress of Physics and Nuclear Physics. Awards
ResearchResearch interestsHis scientific interests centre around quantum field theory and renormalization group, and their applications to particle physics and the statistical physics of phase transitions. With Lee, he has given the first proof of the renormalizability of gauge theories in the symmetry broken phase, as relevant for weak interactions. With first Le Guillou and then Guida, he has derived the most precise estimates of critical exponents by field theoretical methods. He has also worked on the statistical properties of large random matrices. As technical tools, he has contributed to the field integral formulation of quantum field theory, to the understanding of the divergence of perturbation series by semiclassical methods (instantons) and to the development of methods to sum divergent series. Selected articles and books

