Publication : t09/231
Driven quantum coarsening
Aron C. (Université Pierre et Marie Curie, Paris VI, 4 Pl. Jussieu, F-75252 Paris, FRANCE)Biroli G. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)
Cugliandolo L.F. (Université Pierre et Marie Curie, Paris VI, 4 Pl. Jussieu, F-75252 Paris, FRANCE)
Abstract:Année de publication : 2009
We study the driven dynamics of quantum coarsening. We analyze models of M-component rotors coupled to two electronic reservoirs at different chemical potentials that generate a current threading through the system. In the large M limit we derive the dynamical phase diagram as a function of temperature, strength of quantum fluctuations, voltage and coupling to the leads. We show that the slow relaxation in the ordering phase is universal. On large time and length scales the dynamics are analogous to stochastic classical ones, even for the quantum system driven out of equilibrium at zero temperature. We argue that our results apply to generic driven quantum coarsening.
Revue : Phys. Rev. Lett. 102 050404 (2009)
DOI : 10.1103/PhysRevLett.102.050404
Preprint : arXiv:0809.0590
Lien : http://link.aps.org/doi/10.1103/PhysRevLett.102.050404
PACS : 05.60.Gg; 64.70.Tg; 71.10.-w; 73.23.-b
Langue : Anglais
Fichier(s) à télécharger :
PhysRevLett_102_050404.pdf publi.pdf
