Statut | Confirmé |
Série | CONDMAT-ENS |
Domaines | cond-mat |
Date | Mardi 20 Mars 2012 |
Heure | 11:30 |
Institut | LPTENS |
Salle | Conf IV, 24 rue Lhomond (LPT ENS, 2nd floor) |
Nom de l'orateur | Biroli |
Prenom de l'orateur | Guilio |
Addresse email de l'orateur | |
Institution de l'orateur | Saclay |
Titre | Quantum quenches and off-equilibrium dynamical transitions in isolated quantum systems |
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. |
Numéro de preprint arXiv | |
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