Entanglement dynamics of two-bipartite system under the influence of dissipative environments

TL;DR

This paper proposes an experimental scheme using cavity-QED to measure entanglement in a two-qubit system, investigates entanglement decay, and analyzes how initial states and temperature affect entanglement sudden death.

Contribution

It introduces a practical method to directly measure entanglement in cavity-QED systems and studies the dynamics of entanglement under dissipation.

Findings

Entanglement can be directly measured using the proposed scheme.

Entanglement sudden death depends on initial state and reservoir temperature.

The scheme enables analysis of entanglement dynamics in realistic experimental setups.

Abstract

An experimental scheme is suggested that permits a direct measure of entanglement in a two-qubit cavity system. It is realized in the cavity-QED technology utilizing atoms as flying qubits. With this scheme we generate two different measures of entanglement, namely logarithmic negativity and concurrence. The phenomenon of sudden death entanglement (ESD) in a bipartite system subjected to dissipative environment is examined. We show that the sudden death time of the entangled states depends on the initial preparation of the entangled state and the temperature of the reservoir.