Superoperator coupled cluster method for nonequilibrium density matrix

TL;DR

This paper introduces a superoperator coupled cluster method tailored for nonequilibrium open quantum systems, enabling accurate modeling of complex many-body dynamics with applications to quantum transport and electron-phonon interactions.

Contribution

It presents a novel, universal superoperator coupled cluster approach applicable to various quantum systems, extending coupled cluster methods to nonequilibrium density matrix calculations.

Findings

Method accurately models quantum transport with electron-phonon correlations

Results agree well with perturbation and configuration interaction theories

Applicable to fermionic, bosonic, and mixed systems

Abstract

We develop a superoperator coupled cluster method for nonequilibrium open many-body quantum systems described by the Lindblad master equation. The method is universal and applicable to systems of interacting fermions, bosons or their mixtures. We present a general theory and consider its application to the problem of quantum transport through the system with electron-phonon correlations. The results are assessed against the perturbation theory and nonequilibrium configuration interaction theory calculations.