Efficient flow equations for dissipative systems
Abstract
Open quantum systems provide an essential theoretical basis for the development of novel quantum technologies, since any real quantum system inevitably interacts with its environment. Lindblad master equations capture the effect of Markovian environments. Closed quantum systems can be treated using flow equations with the particle conserving generator. We generalize this generator to non-Hermitian matrices and open quantum systems governed by Lindbladians, comparing our results with recently proposed generators by Rosso et al. (arXiv:2007.12044). In comparison, we find that our advocated generator provides an efficient flow with good accuracy in spite of truncations.
Cite
@article{arxiv.2203.15532,
title = {Efficient flow equations for dissipative systems},
author = {Gary Schmiedinghoff and Götz S. Uhrig},
journal= {arXiv preprint arXiv:2203.15532},
year = {2022}
}
Comments
35 pages plus appendices, 15 figures, comments welcome, Submission to SciPost; added references, added explanations regarding transformations of observables and definitions of $Q$, $H^+$ and $H^-$, added App. C and App. D containing analytical arguments