Statut | Confirmé |
Série | CONDMAT-ENS |
Domaines | cond-mat |
Date | Mardi 7 Décembre 2010 |
Heure | 10:45 |
Institut | LPS/ENS |
Salle | Conf. IV |
Nom de l'orateur | Kovrizhin |
Prenom de l'orateur | Dmitry |
Addresse email de l'orateur | d [dot] kovrizhin1 [at] physics [dot] ox [dot] ac [dot] uk |
Institution de l'orateur | Max-Planck Institute for the Physics of Complex Systems, Dresden |
Titre | Equilibration of integer quantum Hall edge states |
Résumé | I will present the results of our recent work [3] on equilibration of quantum Hall edge states at integer filling factors, which was motivated by experiments involving point contacts at finite bias [1,2]. Idealizing the experimental situation and extending the notion of a quantum quench, I will discuss the time evolution of a non-equilibrium state in a translationally invariant system. It will be shown that electron interactions bring the system into a steady state at long times, which is, strikingly, not a thermal one. For filling factor nu=1 I will consider relaxation due to finite-range and Coulomb interactions between electrons in the same channel, and for filling factor nu=2 I will examine relaxation due to contact interactions between electrons in different channels. In both cases a long-time asymptotics of the single-particle correlation function is calculated analytically. Comparison of the results with experiments [1,2] will be presented. [1] "Energy Relaxation in the Integer Quantum Hall Regime" H. le Sueur, C. Altimiras, U. Gennser, A. Cavanna, D. Mailly, F. Pierre, Phys. Rev. Lett. 105, 056803 (2010). [2] "Non-equilibrium edge-channel spectroscopy in the integer quantum Hall regime", C. Altimiras, H. le Sueur, U. Gennser, A. Cavanna, D. Mailly and F. Pierre, Nature Physics 6, 34 (2009). [3] "Equilibration of integer quantum Hall edge states", D.L. Kovrizhin, J.T. Chalker, arXiv:1009.4555 |
Numéro de preprint arXiv | |
Commentaires | |
Fichiers attachés |
Pour obtenir l' affiche de ce séminaire : [ Postscript | PDF ]
|
[ English version ] |