LOW-TEMPERATURE DYNAMICAL SIMULATION OF SPIN-BOSON SYSTEMS

被引:175
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
收藏
页码:15210 / 15220
页数:11
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