Time reparametrization group and the long time behavior in quantum glassy systems

Authors
Kennett, MP Chamon, C
Citation
Mp. Kennett et C. Chamon, Time reparametrization group and the long time behavior in quantum glassy systems, PHYS REV L, 86(8), 2001, pp. 1622-1625
Citations number
43
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
8
Year of publication
2001
Pages
1622 - 1625
Database
ISI
SICI code
0031-9007(20010219)86:8<1622:TRGATL>2.0.ZU;2-K
Abstract
We study the long time dynamics of a quantum version of the Sherrington-Kir kpatrick model. Time reparametrizations of the dynamical equations have a p arallel with renormalization group transformations; in this language the lo ng time behavior of this model is controlled by a reparametrization group ( R(rho)G) fixed point of the classical dynamics. The irrelevance of quantum terms in the dynamical equations in the aging regime explains the classical nature of the out or equilibrium fluctuation-dissipation relation.