Tailored jump operators for purely dissipative quantum magnetism

TL;DR

This paper introduces a flexible architecture for realizing purely dissipative quantum spin models, enabling the study of correlated quantum jump operators and revealing new phases absent in ground state diagrams.

Contribution

It presents a novel architecture for dissipative quantum many-body systems and applies a variational method to uncover new phases in purely dissipative models.

Findings

Discovery of an additional disordered phase in the dissipative Heisenberg model

Development of a tunable class of correlated quantum jump operators

Analysis of purely dissipative spin models without coherent dynamics

Abstract

I propose an archtitecture for the realization of dissipative quantum many-body spin models. The dissipative processes are mediated by interactions with auxiliary particles and lead to a widely tunable class of correlated quantum jump operators. These findings enable the investigation of purely dissipative spin models, where coherent dynamics is entirely absent. I provide a detailed review of a recently introduced variational method to analyze such dissipative quantum many-body systems, and I discuss a specific example in terms of a purely dissipative Heisenberg model, for which I find an additional disordered phase that is not present in the corresponding ground state phase diagram.