A dissipative scheme to approach the boundary of two-qubit entangled mixed states

TL;DR

This paper presents a dissipative method to generate two-qubit states near the boundary of maximally entangled mixed states, using bosonic mode coupling, with analysis of thermal and squeezed effects, suitable for practical light-based systems.

Contribution

It introduces a novel dissipative scheme to produce boundary entangled mixed states with robustness against thermal and phase-damping effects.

Findings

Scheme effectively generates boundary states with high entanglement and purity.

Thermal and squeezed properties influence the state generation process.

The method is feasible in light-based experimental setups.

Abstract

We discuss the generation of states close to the boundary-family of maximally entangled mixed states as defined by the use of concurrence and linear entropy. The coupling of two qubits to a dissipation-affected bosonic mode is able to produce a bipartite state having, for all practical purposes, the entanglement and purity properties of one of such boundary states. We thoroughly study the effects that thermal and squeezed character of the bosonic mode have in such a process and we discuss tolerance to qubit phase-damping mechanisms. The non-demanding nature of the scheme makes it realizable in a matter-light based physical set-up, which we address in some details.