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| Jean-Philippe Uzan | |
|---|---|
| Name | Jean-Philippe Uzan |
| Birth date | 1969 |
| Birth place | Paris, France |
| Nationality | French |
| Fields | Cosmology; Gravitation; Astrophysics |
| Institutions | Institut d'Astrophysique de Paris; CNRS; Universidad de Buenos Aires; Institut des Hautes Études Scientifiques |
| Alma mater | École Normale Supérieure (Paris); Université Pierre et Marie Curie |
| Doctoral advisor | Thibault Damour |
Jean-Philippe Uzan is a French theoretical physicist and cosmologist known for work on gravitation, cosmological tests of fundamental physics, and the interface between astronomy and particle physics. He has held research and leadership roles at major French and international institutions, contributed to observational tests of the Einstein field equations, and authored surveys used by researchers at European Space Agency missions. His career spans collaborations with scientists at Université Paris-Sud, Princeton University, and University of Cambridge.
Born in Paris, he studied at the Lycée Louis-le-Grand before entering the École Normale Supérieure (Paris), where he trained alongside contemporaries from Université Paris Diderot and Université Paris-Saclay. He completed a doctorate at Université Pierre et Marie Curie under advisors connected to the community around Thibault Damour and researchers at CEA Saclay, engaging with topics related to General relativity, Cosmology, and tests of Equivalence principle. During his formative years he interacted with visitors from institutes such as the Max Planck Institute for Gravitational Physics, Institute for Advanced Study, and Kavli Institute for Theoretical Physics.
He joined the Centre national de la recherche scientifique (CNRS) and the Institut d'Astrophysique de Paris, working in groups linked to the Observatoire de Paris and collaborations with Laboratoire Kastler Brossel. Uzan has held visiting appointments at Princeton University, University of Cambridge, and Universidad de Buenos Aires, and participated in programs at the Institute for Advanced Study and Institut des Hautes Études Scientifiques. He has served on advisory boards for the European Space Agency and participated in committees of the French National Centre for Space Studies and panels convened by the Planck Collaboration and the Large Synoptic Survey Telescope community. His positions connected him to networks including the International Astronomical Union, European Southern Observatory, and national academies like the Académie des sciences.
Uzan's research addresses tests of fundamental physics through cosmological and astrophysical observations, exploring links between General relativity, variations of physical constants such as the fine-structure constant, and signatures in the cosmic microwave background measured by missions like Planck Collaboration and WMAP. He investigated constraints on theories motivated by String theory, Kaluza–Klein theory, and Scalar–tensor theories of gravity, contributing to model-independent parametrizations used by the Euclid mission and by analyses at the European Southern Observatory. His work connects cosmic distance measures using Type Ia supernovae and Baryon acoustic oscillations with local tests from Lunar Laser Ranging and experiments influenced by Eötvös-type torsion balance tests, and he has examined implications for the Lambda-CDM model and alternatives involving Modified Newtonian dynamics and f(R) gravity. Collaborating with researchers from Oxford University, Harvard University, Stanford University, and University of California, Berkeley, he developed statistical frameworks applied in analyses by the Sloan Digital Sky Survey and surveys planned by the Dark Energy Survey.
Uzan authored reviews and monographs that synthesize observational constraints and theoretical perspectives for readers at Princeton University Press-level and in journals like Physical Review D, Classical and Quantum Gravity, and Astronomy & Astrophysics. Notable works include comprehensive reviews on varying constants cited alongside papers by John D. Barrow, Paul Dirac, Mikhail Shaposhnikov, and Thibault Damour, and contributions to collaborative papers with members of the Planck Collaboration and Euclid Consortium. His papers appear in proceedings from conferences hosted by CERN, Les Houches, and the Perimeter Institute and are referenced in surveys by the International Astronomical Union.
He received recognition from French institutions including prizes awarded by the Société Française de Physique and distinctions from the Centre national de la recherche scientifique, and he was invited to deliver lectures at the Collège de France, the Institut Henri Poincaré, and international venues such as the Royal Society and the American Physical Society meetings. His advisory roles for projects at the European Space Agency and participation in panels of the European Research Council reflect peer recognition across agencies including the Agence Nationale de la Recherche.
At the Université Pierre et Marie Curie and the Institut d'Astrophysique de Paris, he supervised doctoral students and postdoctoral researchers who went on to positions at institutions like CEA Saclay, Max Planck Institute for Astrophysics, Imperial College London, Caltech, University of Toronto, and University of Tokyo. He taught courses that intersected material from texts by Misner, Thorne and Wheeler, Steven Weinberg, and Sean Carroll and organized graduate seminars with faculty from École Normale Supérieure (Paris) and visiting professors from Harvard University and Princeton University.
He has communicated science through interviews with outlets including Le Monde, Nature, and Science, and has appeared on programs produced by France Culture and BBC Radio to discuss cosmology, observational probes like the Hubble Space Telescope, and missions such as Gaia and Euclid. Uzan contributed to public lectures at venues including the Cité des Sciences et de l'Industrie, the Royal Institution, and festivals like the Festival de Cannes's science segments and the World Science Festival.
Category:French physicists Category:Cosmologists Category:Living people