Diagrammatic representation and nonperturbative approximations of the exact time-convolutionless master equation

被引：0
|
作者：
Gu, Bing [1 ,2 ,3 ]
机构：
[1] Westlake Univ, Dept Chem, Hangzhou 310030, Zhejiang, Peoples R China
[2] Westlake Univ, Dept Phys, Hangzhou 310030, Zhejiang, Peoples R China
[3] Westlake Inst Adv Study, Inst Nat Sci, Hangzhou 310024, Zhejiang, Peoples R China
来源：
JOURNAL OF CHEMICAL PHYSICS | 2024年 / 160卷 / 20期
基金：
中国国家自然科学基金;
关键词：
QUANTUM;
D O I：
10.1063/5.0187191
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The time-convolutionless master equation provides a general framework to model the non-Markovian dynamics of an open quantum system with a time-local generator. A diagrammatic representation is developed and proven for the perturbative expansion of the exact time-local generator for an open quantum system interacting with arbitrary environments. A truncation of the perturbation expansion leads to perturbative time-convolutionless quantum master equations. We further introduce a general iterative approach to construct nonperturbative approximations for the time-local generator as nested time-ordered exponential operators.
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页数：7
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