QUANTUM DYNAMICS OF A DAMPED PARTICLE IN A TIGHT-BINDING LATTICE

被引：12

作者：

SASSETTI, M ^{[1
]}

MILCH, M ^{[1
]}

WEISS, U ^{[1
]}

机构：

[1] UNIV STUTTGART, INST THEORET PHYS, W-7000 STUTTGART 80, GERMANY

来源：

PHYSICAL REVIEW A | 1992年 / 46卷 / 08期

关键词：

D O I：

10.1103/PhysRevA.46.4615

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The motion of a quantum particle in a tight-binding lattice coupled to an Ohmic thermal reservoir is analyzed in the path-integral formalism. We derive exact formal expressions for moments of the probability distribution both for noncorrelated and correlated thermal initial states of the particle-plus-reservoir complex. Based on these expressions we discuss the role of initial conditions on the subsequent motion and calculate the differences in the transient behavior. For a particular value of the damping strength we find the exact solution of the dynamics in analytic form at any time, temperature, and bias for the two kinds of initial states.

引用

页码：4615 / 4629

页数：15

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