A Dynamical Study of the Quantum p=2 Spherical Model
Disordered Systems and Neural Networks
2009-11-10 v2
Abstract
We present a dynamical study of the disordered quantum p=2 spherical model at long times. Its phase behavior as a function of spin-bath coupling, strength of quantum fluctuations and temperature is characterized, and we identify different paramagnetic and coarsened regions. A quantum critical point at zero temperature in the limit of vanishing dissipation is also found. Furthermore we show analytically that the fluctuation-dissipation theorem is obeyed in the stationary regime.
Cite
@article{arxiv.cond-mat/0301166,
title = {A Dynamical Study of the Quantum p=2 Spherical Model},
author = {Michal Rokni and Premala Chandra},
journal= {arXiv preprint arXiv:cond-mat/0301166},
year = {2009}
}
Comments
13 pages, 4 figures; published version