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DTSTART;TZID=Europe/Paris:20260317T140000
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DTSTAMP:20260523T010143
CREATED:20260310T201733Z
LAST-MODIFIED:20260311T091526Z
UID:11839-1773756000-1773759600@fermi.univ-tlse3.fr
SUMMARY:Ordres concurrents dans les systèmes à plusieurs électrons : une perspective de groupe de renormalisation. - (Kilian Fraboulet / LPT / Seminar). - 17/03/2026\, 14H
DESCRIPTION:Séminaire LPT \nKilian Fraboulet  MPI-FKF\, Stuttgart \nSeminar LPT\, 17/03/2026\, 14H\, 3R4\, salle de conférence \nSummary\nThe renormalization group is an established approach to study quantum many-body systems\, and this applies especially to one of its modern implementations known as functional renormalization group (FRG). In particular\, the FRG constitutes a flexible and unbiased tool for the study of competing orders. In this talk\, I will outline recent progress in this direction for correlated electron systems. For this\, I will first discuss the competition between antiferromagnetism\, charge density waves and superconductivity in the 2D Hubbard model\, thus making a connection with cuprate superconductors. The special role of bosonization methods will also be emphasized along the way. I will also show how the FRG can be efficiently combined with dynamical mean-field theory to treat d-wave superconductivity and with density functional theory to study altermagnetism. As a next step\, I will increase the complexity of the model including non-local interactions and discuss unconventional superconductivity in an extended Hubbard model with a connection to moiré materials. Special consideration will also be given to the treatment of retarded interactions with electron-phonon couplings. Finally\, I will also highlight recent FRG studies of quantum criticality in Dirac materials\, with a connection to graphene. \n\n\n\n 
URL:https://fermi.univ-tlse3.fr/event/ordres-concurrents-dans-les-systemes-a-plusieurs-electrons-une-perspective-de-groupe-de-renormalisation-kilian-fraboulet-lpt-seminar-17-03-20265-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
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