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Statut |
Confirmé |
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Série |
CONDMAT-ENS |
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Domaines |
cond-mat |
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Date |
Mardi 20 Mars 2012 |
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Heure |
11:30 |
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Institut |
LPTENS |
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Salle |
Conf IV, 24 rue Lhomond (LPT ENS, 2nd floor) |
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Nom de l'orateur |
Biroli |
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Prenom de l'orateur |
Guilio |
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Addresse email de l'orateur |
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Institution de l'orateur |
Saclay |
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Titre |
Quantum quenches and off-equilibrium dynamical transitions in isolated quantum systems |
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Résumé |
Quantum quenches are protocols corresponding to an abrupt change of
a parameter of the Hamiltonian of an isolated quantum system initially
prepared in the ground state. They mimic experimental procedures
used for cold atoms. In this talk I shall discuss the off-equilibrium
dynamics induced by quantum quenches by focusing on simple models
that can be fully studied analytically: the infinite dimensional Bose Hubbard
model and the three dimensional large-N $\phi^4$ quantum field theory.
In both cases, I shall show that there is a critical value of the quenching
parameter that leads to an out of equilibrium dynamical transition and
present its properties. I will conclude by discussing extensions
and limitations of our approach and the generality of this transition. |
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
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