Distributed entanglement induced by dissipative bosonic media

TL;DR

This paper presents an analytic scheme to generate high-fidelity steady-state entanglement between two atoms mediated by a dissipative bosonic environment, robust against initial states and parameter fluctuations.

Contribution

The authors introduce a novel analytic method for steady-state entanglement generation via dissipative bosonic media, including effects of off-resonance modes and phase control.

Findings

High-fidelity entanglement achievable regardless of initial states

Fidelity scales linearly with the cooperativity parameter

Fidelity remains stable against Rabi frequency fluctuations

Abstract

We describe a scheme with analytic result that allows to generate steady-state entanglement for two atoms over a dissipative bosonic medium. The resonant coupling between the mediating bosonic mode and cavity modes produces three collective atomic decay channels. This dissipative dynamics, together with the unitary process induced by classical microwave fields, drives the two atoms to the symmetric or asymmetric entangled steady state conditional upon the choice of the phases of the microwave fields. The effects on the steady-state entanglement of off-resonance mediating bosonic modes are analyzed. The entanglement can be obtained with high fidelity regardless of the initial state and there is a linear relation in the scaling of the fidelity with the cooperativity parameter. The fidelity is insensitive to the fluctuation of the Rabi frequencies of the classical driving fields.