Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série SEM-LPTM-UCP
Domaines cond-mat
Date Jeudi 24 Mai 2018
Heure 14:00
Institut LPTM
Salle 4.13 St Martin II
Nom de l'orateur Roux
Prenom de l'orateur Guillaume
Addresse email de l'orateur
Institution de l'orateur LPTMS Université Paris Sud
Titre Artificial spin models: examples from topological bosons and Rydberg atoms
Résumé The goal of this seminar is to present how spin models are relevant in the physics of quantum simulators through two examples. In the first one, we show that the strong interacting limit of a topological Bose-Hubbard model with two species maps onto a 2D XY spin model with frustrated couplings on the honeycomb lattice. This model displays an exotic phase thats breaks both parity and time reversal symmetry through the stabilization of a chiral order parameter. While the ground-state remains gapped and the original bosonic model is topological, we find a zero Chern number for the groundstate. In the second example, we discuss how spin models are realized in Rydberg based quantum simulators. We discuss a proposal envisionned by colleagues at College de France and perspectives on some relevant information that could be extracted from the Loschmidt echo.
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