Nonequilibrium dynamics of quantum spin glass in an AC magnetic field

被引：0
|
作者：
G. Busiello
R. V. Saburova
V. G. Sushkova
G. P. Chugunova
机构：
[1] Baronissi-Salerno and INFM-Unitá di Salerno,Dipartimento di Fisica “E.R. Caianiello,”
[2] Universitá di Salerno,undefined
[3] Kazan State Power University,undefined
[4] Kazan State University of Technology,undefined
来源：
Physics of the Solid State | 2004年 / 46卷
关键词：
Autocorrelation; Energy Dissipation; Quantum System; Harmonic Oscillator; Autocorrelation Function;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The ageing effect is studied analytically in a disordered quantum system interacting with its surroundings and subjected to an external ac magnetic field. Energy dissipation is due to the interaction of the system with a set of independent harmonic oscillators, imitating a quantum thermal bath. Dynamic equations for the autocorrelation function and linear-response function are derived using the method of closed-path integrals. The effect of an external field is studied on the correlation function and response in the spin-glass and paramagnetic phases. Both functions are found to depend on the spin interaction strength.
引用
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页码：316 / 325
页数：9
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