Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines cond-mat
Date Vendredi 12 Octobre 2018
Heure 14:00
Institut LPTM
Salle 4.13 St Martin II
Nom de l'orateur Fromholz
Prenom de l'orateur Pierre
Addresse email de l'orateur
Institution de l'orateur LPTM UCP Cergy Pontoise
Titre "haldane" phases (and more) with ultra-cold fermions in double-well optical lattices"
Résumé Topological phases exist beyond the standard Ginzburg-Landau paradigm that dominated the understanding of phases and phase transitions in condensed matter systems. Paradigmatic examples have been derived to establish a new theoretical basis that takes into consideration these topological aspects. The spin 1 Haldane phase is one of them for the unidimensional case. The seminar presents a way to implement this phase as well as its suggested generalizations by focusing using ultracold fermionic alkaline-earth atoms, that involve an internal SU($N$) symmetry. The model describing the experiment is called the double-well model and depicts a lattice of two interacting chains. The model is analysed at weak coupling, strong coupling and using a numerical tool : DMRG.
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