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Statut |
Confirmé |
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Série |
SEM-LPTMC |
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Domaines |
cond-mat.mes-hall |
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Date |
Lundi 14 Décembre 2020 |
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Heure |
16:00 |
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Institut |
LPTMC |
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Salle |
On-line zoom seminar |
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Nom de l'orateur |
Rossi |
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Prenom de l'orateur |
Riccardo |
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Addresse email de l'orateur |
riccardorossi4 [at] gmail [dot] com |
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Institution de l'orateur |
Simons Foundation, Flatiron, New-York |
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Titre |
High-order renormalized perturbative approach for strongly-correlated fermions |
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Résumé |
In this talk I show how perturbation theory can be turned into a viable computational approach for physical systems afflicted by the fermionic sign problem. This is accomplished by designing new numerical approaches to reach arbitrary-high orders for the bare [1] and the renormalized [2] expansion. I discuss the results obtained for the doped square-lattice Hubbard model in the pseudogap regime, and in frustrated lattices. Finally, I present the first unbiased diagrammatic computation in a broken-symmetry phase by discussing the s-wave superfluid transition in the spin-polarized cubic-lattice attractive Hubbard model.
[1] RR, PRL 119, 045701 (2017)
[2] RR, Simkovic, Ferrero, EPL 132, 11001 (2020) |
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Numéro de preprint arXiv |
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Commentaires |
https://zoom.us/j/96903025813
ID de réunion : 969 0302 5813
Code secret : 007425 |
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Fichiers attachés |
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