Diagrammatic representation and nonperturbative approximation of exact time-convolutionless master equation
Quantum Physics
2023-10-19 v1 Mathematical Physics
math.MP
Chemical Physics
Abstract
The time-convolutionless master equation provides a general framework to model 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 the perturbative time-convolutionless quantum master equations. We further introduce a nonperturbative approach that approximates the time-convolutionless generator as a nested time-ordered exponential function.
Keywords
Cite
@article{arxiv.2310.11729,
title = {Diagrammatic representation and nonperturbative approximation of exact time-convolutionless master equation},
author = {Bing Gu},
journal= {arXiv preprint arXiv:2310.11729},
year = {2023}
}