Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines cond-mat.mes-hall
Date Mercredi 4 Décembre 2019
Heure 11:00
Institut LPTMC
Salle Jussieu tower 13-12, 5th floor, room 5-23
Nom de l'orateur Rossi
Prenom de l'orateur Riccardo
Addresse email de l'orateur
Institution de l'orateur Flatiron Institute, New-York
Titre New diagrammatic Monte Carlo approches to the quantum many-body problem
Résumé Finding a way to numerically simulate many interacting quantum particles would be of great fundamental and practical value. In this talk, I will discuss a broad class of approaches based on diagrammatic expansions that allows to obtain numerically-exact results in a time polynomially increasing with the inverse of the requested precision. Recent advances allow to include renormalization and non-perturbative information (e.g. Dynamical Mean Field Theory for lattice problems) in the expansion using a succinct, and, most importantly, very efficient, formalism. I will present state-of-the-art numerically-exact results for the doped square-lattice Hubbard model, and the generic efficient code we have developed.
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