Non-Markovianity assisted Steady State Entanglement

TL;DR

This paper demonstrates that non-Markovian environmental effects can sustain steady state entanglement in a quantum system, unlike Markovian dynamics which lead to separable states, with experimental feasibility shown using trapped ions.

Contribution

It reveals non-Markovianity as a resource for steady state entanglement and provides a practical experimental setup for demonstration.

Findings

Non-Markovianity supports steady state entanglement.

Markovian dynamics result in separable steady states.

Experimental feasibility with trapped ions is shown.

Abstract

We analyze the steady state entanglement generated in a coherently coupled dimer system subject to dephasing noise as a function of the degree of Markovianity of the evolution. By keeping fixed the effective noise strength while varying the memory time of the environment, we demonstrate that non-Markovianity is an essential, quantifiable resource that may support the formation of steady state entanglement whereas purely Markovian dynamics governed by Lindblad master equations lead to separable steady states. This result illustrates possible mechanisms leading to long-lived entanglement in purely decohering, possibly local, environments. We present a feasible experimental demonstration of this noise assisted phenomenon using a system of trapped ions.