Status | Confirmed |
Seminar Series | SEM-LPTHE |
Subjects | cond-mat.stat-mech |
Date | Friday 28 September 2018 |
Time | 11:00 |
Institute | LPTHE |
Seminar Room | Bibliothèque |
Speaker's Last Name | Fromholz |
Speaker's First Name | Pierre |
Speaker's Email Address | |
Speaker's Institution | LPTM Cergy |
Title | Haldane phases (and more) with ultra-cold fermions in double-well optical lattices |
Abstract | 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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