We develop nonequilibrium auxiliary quantum master equation dual boson method (aux-DB), and argue that it presents a convenient way to describe steady states of correlated impurity models (such as single molecule optoelectronic devices) where electron and energy transport should be taken into account. The aux-DB is shown to provide high accuracy with relatively low numerical cost. Theoretical analysis is followed by illustrative simulations within generic two-level junction model, where the new scheme is benchmarked against numerically exact results.
@article{arxiv.1912.08230,
title = {Nonequilibrium dual-boson approach},
author = {Feng Chen and Mikhail I. Katsnelson and Michael Galperin},
journal= {arXiv preprint arXiv:1912.08230},
year = {2020}
}