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arXiv 2103.12042quant-phmath-phmath.MP
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超越久期近似的统一Gorini-Kossakowski-Lindblad-Sudarshan量子主方程

Unified Gorini-Kossakowski-Lindblad-Sudarshan quantum master equation beyond the secular approximation

Anton Trushechkin

摘要:

推导出一个弱耦合系统的量子主方程,它考虑了非长期效应,但仍然具有数学上正确的Gorini-Kossakowski-Lindblad-Sudarshan形式(特别是,它保留了密度算符的正性),并且还满足标准的热力学性质,这是开放量子系统理论中一个已知的长期存在的问题。当系统的某些能级或它们的差(玻尔频率)接近简并时,非久期项是重要的。我们提供了一个充分严格的推导,这样的方程的基础上的形式化的弱耦合极限的一般情况下。

英文摘要:

Derivation of a quantum master equation for a system weakly coupled to a bath which takes into account nonsecular effects, but nevertheless has the mathematically correct Gorini-Kossakowski-Lindblad-Sudarshan form (in particular, it preserves positivity of the density operator) and also satisfies the standard thermodynamic properties is a known long-standing problem in theory of open quantum systems. The nonsecular terms are important when some energy levels of the system or their differences (Bohr frequencies) are nearly degenerate. We provide a fully rigorous derivation of such equation based on a formalization of the weak-coupling limit for the general case.

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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