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arXiv 1003.1177quant-ph
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量子轨道方法下开放量子系统的Born-Oppenheimer近似

Born-Oppenheimer approximation for open quantum systems within the quantum trajectory approach

X. L. Huang, S. L. Wu, L. C. Wang, X. X. Yi

摘要:

基于量子轨道方法,将Born-Oppenheimer(BO)近似从封闭量子系统推广到开放量子系统,其中开放量子系统由Lindblad形式的主方程描述.定义了BO近似,并推导了其有效性条件。我们发现,在快变量的耗散有利于BO近似,这是不同的慢变量的耗散。这个扩展和我们以前的近似(基于有效哈密顿方法,见X。L. Huang和X. X. Yi,Phys.Rev.A80,032108(2009))。分析了这两种近似的新特点和优点,表明它们是互补的。两个例子来说明我们的方法。

英文摘要:

Based on the quantum trajectory approach, we extend the Born-Oppenheimer (BO) approximation from closed quantum system to open quantum system, where the open quantum system is described by a master equation in Lindblad form. The BO approximation is defined and the validity condition is derived. We find that the dissipation in fast variables benefits the BO approximation that is different from the dissipation in slow variables. A detailed comparison between this extension and our previous approximation (that is based on the effective Hamiltonian approach, see X. L. Huang and X. X. Yi, Phys. Rev. A 80, 032108 (2009)) is presented. Several new features and advantages are analyzed, which show that the two approximations are complementary to each other. Two examples are taken to illustrate our method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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