Dissipative Entanglement of Quantum Spin Fluctuations

TL;DR

This paper demonstrates that dissipative dynamics in quantum spin chains can generate entanglement between mesoscopic spin fluctuations, revealing a novel mechanism for quantum correlation creation in open quantum systems.

Contribution

It introduces a mechanism by which local dissipative processes entangle mesoscopic quantum spin fluctuations in non-interacting chains, a new insight into dissipative quantum entanglement.

Findings

Dissipative dynamics can entangle mesoscopic spin fluctuations.

Quantum correlations depend on temperature and dissipation strength.

Entanglement arises through a purely mixing mechanism.

Abstract

We consider two non-interacting infinite quantum spin chains immersed in a common thermal environment and undergoing a local dissipative dynamics of Lindblad type. We study the time evolution of collective mesoscopic quantum spin fluctuations that, unlike macroscopic mean-field observables, retain a quantum character in the thermodynamical limit. We show that the microscopic dissipative dynamics is able to entangle these mesoscopic degrees of freedom, through a purely mixing mechanism. Further, the behaviour of the dissipatively generated quantum correlations between the two chains is studied as a function of temperature and dissipation strength.