|
Statut |
Confirmé |
|
Série |
CONDMAT-ENS |
|
Domaines |
cond-mat |
|
Date |
Mardi 16 Fevrier 2010 |
|
Heure |
10:45 |
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Institut |
LPS/ENS |
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Salle |
Conf. IV |
|
Nom de l'orateur |
Roscilde |
|
Prenom de l'orateur |
Tommaso |
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Addresse email de l'orateur |
tommaso [dot] roscilde [at] ens-lyon [dot] fr |
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Institution de l'orateur |
Ecole Normale Superieure de Lyon |
|
Titre |
Dynamical emergence of supersolidity in asymmetric boson mixtures in an optical lattice |
|
Résumé |
Supersolidity - the simultaneous appearance of Bose condensation and
crystalline order in a degenerate system of bosons - is a long-sought and
elusive phenomenon in condensed matter. Cold-atom realizations of a
supersolid can be envisioned in optical lattices, in which spontaneous
crystallization of atoms occurs in presence of finite-range or
long-range interactions, or in the case of interactions mediated by
a secondary atomic species.
In this talk I will theoretically discuss how (quasi-)condensation can
emerge dynamically in a mixture of two hardcore boson species with
mass and number imbalance in a one-dimensional optical lattice.
Starting from a "molecular crystal" of trimers (made of two heavy
and one light particle) and suddenly changing the Hamiltonian
of the system, we observe that (quasi-)condensation appears in
both atomic species without disrupting the crystalline order imprinted
in the system. An extensive study of the ground state phase diagram
of this model shows that this supersolid state has no equilibrium
counterpart. This suggests the intriguing possibility of engineering
novel many-body states via a controlled collective quantum evolution
in cold-atom systems. |
|
Numéro de preprint arXiv |
|
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Commentaires |
Café (et croissants) à 10h30 |
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Fichiers attachés |
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