摘要翻译：
在开放量子系统中，退相干是通过量子子系统与其环境的相互作用而发生的。期望值的计算需要对算子的量子动力学知识和从描述子系统和浴的密度矩阵的初始状态取样。我们考虑了量子演化可以用量子经典刘维尔动力学近似的情形，并考察了演化可以归结为表面跳跃动力学的情形，其中演化由仅在单个绝热表面上演化的轨迹段组成，这些表面之间有概率跳跃。减少的理由依赖于一个Markovian近似的有效性，在一个浴平均的记忆核上，这个核解释了系统中的量子相干性。我们表明，当初始采样来自量子或经典浴初始分布时，这种还原通常是可能的。如果平均值只取在使经典分布展宽的量子色散上，那么这种减小并不总是可能的。
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英文标题：
《Surface-hopping dynamics and decoherence with quantum equilibrium
  structure》
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作者：
Robbie Grunwald, Hyojoon Kim, and Raymond Kapral
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最新提交年份：
2008
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分类信息：

一级分类：Physics        物理学
二级分类：Statistical Mechanics        统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
  In open quantum systems decoherence occurs through interaction of a quantum subsystem with its environment. The computation of expectation values requires a knowledge of the quantum dynamics of operators and sampling from initial states of the density matrix describing the subsystem and bath. We consider situations where the quantum evolution can be approximated by quantum-classical Liouville dynamics and examine the circumstances under which the evolution can be reduced to surface-hopping dynamics, where the evolution consists of trajectory segments evolving exclusively on single adiabatic surfaces, with probabilistic hops between these surfaces. The justification for the reduction depends on the validity of a Markovian approximation on a bath averaged memory kernel that accounts for quantum coherence in the system. We show that such a reduction is often possible when initial sampling is from either the quantum or classical bath initial distributions. If the average is taken only over the quantum dispersion that broadens the classical distribution, then such a reduction is not always possible.
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PDF链接：
https://arxiv.org/pdf/801.3406