Dynamics of entanglement in Two-Qubit Open System Interacting with a Squeezed Thermal Bath via Dissipative interaction

TL;DR

This paper investigates how entanglement evolves in a two-qubit system interacting with a squeezed thermal bath, using a novel measure of mixed state entanglement, and explores implications for quantum repeaters.

Contribution

It introduces a new approach to quantify entanglement dynamics in open quantum systems interacting with a squeezed thermal environment.

Findings

Entanglement dynamics depend on bath squeezing parameters.

The measure reveals detailed entanglement distribution in Hilbert space.

Application to quantum repeaters demonstrates practical relevance.

Abstract

We study the dynamics of entanglement in a two-qubit system interacting with a squeezed thermal bath via a dissipative system-reservoir interaction with the system and reservoir assumed to be in a separable initial state. The resulting entanglement is studied by making use of a recently introduced measure of mixed state entanglement via a probability density function which gives a statistical and geometrical characterization of entanglement by exploring the entanglement content in the various subspaces spanning the two-qubit Hilbert space. We also make an application of the two-qubit dissipative dynamics to a simplified model of quantum repeaters.