Michal Rokni, Premala Chandra
Published 2003-01-11, updated 2004-03-21Version 2
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.
Comments: 13 pages, 4 figures; published version
Journal: Phys. Rev. B 69, 094403 (2004)
Propagation and Backscattering of Mechanical Impulses in a Gravitationally Loaded Chain: Dynamical Studies and Toy Model Based Phenomenology
The influence of Anderson localization on the mode decay of excited nonlinear systems
A spherical model with directional interactions: I. Static properties
