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DTSTART;TZID=Europe/Paris:20241212T100000
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DTSTAMP:20260417T163558
CREATED:20241212T064806Z
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UID:11232-1733997600-1734003000@fermi.univ-tlse3.fr
SUMMARY:Physique quantique à plusieurs corps avec des fermions dans une boîte optique. - (Nir Navon/ LPT / Seminar). - 12/12/2024\, 10H
DESCRIPTION:Séminaire LPT \nNir Navon (Université Yale) \nSeminar LPT\, 12/12/2024\, 10H\, 3R4\, salle de conférence \nSummary\nFor the past two decades harmonically trapped ultracold atomic gases have been used with great success to study fundamental many-body physics in flexible experimental settings. However\, the resulting gas density inhomogeneity in those traps makes it challenging to study paradigmatic uniform-system physics (such as critical behavior near phase transitions) or complex quantum dynamics. \nThe realization of homogeneous quantum gases trapped in optical boxes has marked a milestone in the quantum simulation program with ultracold atoms [1]. These textbook systems have proved to be a powerful playground by simplifying the interpretation of experimental measurements\, by making more direct connections to theories of the many-body problem that generally rely on the translational symmetry of the system\, and by altogether enabling previously inaccessible experiments. \nIn this talk\, I will present some of our recent studies of many-body physics with ultracold fermions trapped in a box of light [2-6]. This platform is particularly suitable to study problems of Fermi-system stability\, of which I will discuss two cases : the spin-1/2 Fermi gas with repulsive contact interactions [2]\, and the three-component Fermi gas with spin-population imbalance [3]. Both studies lead to surprising results\, highlighting how spatial homogeneity not only simplifies the connection between experiments and theory\, but can also unveil unexpected outcomes. I will also present other recent works\, including the first observation of the fermionic Joule-Thomson effect [4]\, the strongly driven Fermi polaron [5]\, and the emergence of sound in a Fermi gas with tunable interactions [6]. \nReferences :\n[1] N. Navon\, R.P. Smith\, Z. Hadzibabic\, Nature Phys. 17\, 1334 (2021) \n[2] Y. Ji et al.\, Phys. Lev. Lett 129\, 203402 (2022) \n[3] G.L. Schumacher et al.\, arXiv:2301.02237 \n[4] Y. Ji et al.\, Phys. Lev. Lett 132\, 153402 (2024) \n[5] F.J. Vivanco \, arXiv:2308.05746 \n[6] S. Huang\, arXiv:2407.13769
URL:https://fermi.univ-tlse3.fr/event/physique-quantique-a-plusieurs-corps-avec-des-fermions-dans-une-boite-optique-nir-navon-lpt-seminar-12-12-2024-10h-2/
CATEGORIES:Events,LPT,Seminars
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