{"id":11232,"global_id":"fermi.univ-tlse3.fr\/fr\/home?id=11232","global_id_lineage":["fermi.univ-tlse3.fr\/fr\/home?id=11232"],"author":"5","status":"publish","date":"2024-12-12 07:48:06","date_utc":"2024-12-12 06:48:06","modified":"2024-12-12 11:09:59","modified_utc":"2024-12-12 10:09:59","url":"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/physique-quantique-a-plusieurs-corps-avec-des-fermions-dans-une-boite-optique-nir-navon-lpt-seminar-12-12-2024-10h-2\/","rest_url":"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/wp-json\/tribe\/events\/v1\/events\/11232","title":"Physique quantique \u00e0 plusieurs corps avec des fermions dans une bo\u00eete optique. – (Nir Navon\/ LPT \/ Seminar). – 12\/12\/2024, 10H","description":"

S\u00e9minaire LPT<\/span><\/p>\n

Nir Navon <\/strong><\/span>(Universit\u00e9 Yale)<\/span><\/p>\n

Seminar LPT, 12\/12\/2024, 10H, 3R4, salle de conf\u00e9rence<\/span><\/p>\n

Summary<\/strong>
\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.<\/p>\n

The realization of homogeneous quantum gases trapped in optical boxes has marked a milestone in the quantum simulation program with ultracold atoms [1]<\/strong>. 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.<\/p>\n

In 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]<\/strong>. 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]<\/strong>, and the three-component Fermi gas with spin-population imbalance [3]<\/strong>. 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]<\/strong>, the strongly driven Fermi polaron [5], and the emergence of sound in a Fermi gas with tunable interactions [6]<\/strong>.<\/p>\n

References :<\/strong>
\n[1]<\/strong> N. Navon, R.P. Smith, Z. Hadzibabic, Nature Phys. 17, 1334 (2021)<\/a><\/p>\n

[2]<\/strong> Y. Ji et al., Phys. Lev. Lett 129, 203402 (2022)<\/a><\/p>\n

[3]<\/strong> G.L. Schumacher et al., arXiv:2301.02237<\/a><\/p>\n

[4]<\/strong> Y. Ji et al., Phys. Lev. Lett 132, 153402 (2024)<\/a><\/p>\n

[5]<\/strong> F.J. Vivanco , arXiv:2308.05746<\/a><\/p>\n

[6]<\/strong> S. Huang, arXiv:2407.13769<\/a><\/p>\n

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