Asymmetric many-body loss in a bosonic double well

TL;DR

This paper explores how asymmetric many-body loss affects the dynamics of a bosonic double well system, providing analytical and approximate solutions validated by Monte Carlo simulations.

Contribution

It introduces a combined mean-field and Bogoliubov back-reaction approach extended to three-body loss, advancing the modeling of dissipative many-body quantum systems.

Findings

Analytical solutions for noninteracting asymmetric single-body dissipation.

Approximate methods for many-body dynamics with three-body loss.

Validation of approximations against exact Monte Carlo simulations.

Abstract

A Bose gas in a double well is investigated in the presence of single-particle, two-body and three-body asymmetric loss. The loss induces an interesting decay behavior of the total population as well as a possibility to control the dynamics of the system. In the noninteracting limit with asymmetric single-body dissipation, the dynamics of the populations can be obtained analytically. The general many-body problem requires, however, an adequate approximation. We use a mean-field approximation and the Bogoliubov back-reaction beyond mean-field truncation, which we extend up to three-body loss. Both methods are compared with exact many-body Monte-Carlo simulations.