Breaking conservation law enables steady-state entanglement out of equilibrium

• URL: http://arxiv.org/abs/2508.18131v1
• Date: Wed, 20 Aug 2025 08:03:55 GMT
• Title: Breaking conservation law enables steady-state entanglement out of equilibrium
• Authors: Vince Hou, Eric Kleinherbers, Shane P. Kelly, Yaroslav Tserkovnyak,
• Abstract summary: We show how entangled steady states can be prepared by purely dissipative dynamics in a system coupled to a thermal environment.<n>We illustrate the scheme in a model of two color centers weakly coupled to a spin-pumped magnet, where tuneable magnon excitations enable steady-state entanglement over finite distances.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We show how entangled steady states can be prepared by purely dissipative dynamics in a system coupled to a thermal environment. While entanglement is hindered by thermalization when the system and environment exchange a conserved quantity, we demonstrate that breaking this conservation law through the system-environment interaction drives the system to a nonequilibrium steady state. Such an interaction will generate multiple competing equilibration channels, effectively mimicking baths at distinct chemical potentials. When the environment also supports long-range correlations, these channels mediate nonlocal dissipation capable of generating entanglement. We illustrate the scheme in a model of two color centers weakly coupled to a spin-pumped magnet, where tuneable magnon excitations enable steady-state entanglement over finite distances. Our results outline a scalable approach to dissipative entanglement generation, rooted in the conservation structure and environmental correlations rather than fine-tuned coherent control or active driving.

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