Status | Confirmed |
Seminar Series | SEM-LPTMC |
Subjects | cond-mat.mes-hall |
Date | Monday 14 December 2020 |
Time | 16:00 |
Institute | LPTMC |
Seminar Room | On-line zoom seminar |
Speaker's Last Name | Rossi |
Speaker's First Name | Riccardo |
Speaker's Email Address | riccardorossi4 [at] gmail [dot] com |
Speaker's Institution | Simons Foundation, Flatiron, New-York |
Title | High-order renormalized perturbative approach for strongly-correlated fermions |
Abstract | 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) |
arXiv Preprint Number | |
Comments | https://zoom.us/j/96903025813 ID de réunion : 969 0302 5813 Code secret : 007425 |
Attachments |
To Generate a poster for this seminar : [ Postscript | PDF ]
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