LOW-TEMPERATURE DYNAMICAL SIMULATION OF SPIN-BOSON SYSTEMS

被引：177

作者：

EGGER, R ^{[1
]}

MAK, CH ^{[1
]}

机构：

[1] UNIV SO CALIF,DEPT CHEM,LOS ANGELES,CA 90089

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.50.15210

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dynamics of spin-boson systems at very low temperatures has been studied using a real-time path-integral simulation technique, which combines a stochastic Monte Carlo sampling over the quantum fluctuations with an exact treatment of the quasiclassical degrees of freedom. To a large degree, this special technique circumvents the dynamical sign problem and allows the dynamics to be studied directly up to long real times in a numerically exact manner. This method has been applied to two important problems: (1) crossover from nonadiabatic to adiabatic behavior in electron-transfer reactions, (2) the zero-temperature dynamics in the antiferromagnetic Kondo region 1/2<K<1, where K is Kondos parameter. © 1994 The American Physical Society.

引用

页码：15210 / 15220

页数：11