Dynamics of Entanglement and Bell-nonlocality for Two Stochastic Qubits with Dipole-Dipole Interaction

TL;DR

This paper analyzes how dipole-dipole interactions influence the evolution of entanglement and Bell nonlocality in two noisy qubits, revealing conditions under which nonlocal entanglement is preserved from sudden death.

Contribution

It provides an analytical study of the dynamics of entanglement and Bell nonlocality in two interacting noisy qubits, highlighting conditions that protect nonlocal entanglement from sudden death.

Findings

Dipole-dipole interaction can protect nonlocal entanglement from sudden death.

The dynamics of Bell nonlocality and entanglement are analytically characterized.

Certain initial states maintain nonlocal entanglement despite noise.

Abstract

We have studied the analytical dynamics of Bell nonlocality as measured by CHSH inequality and entanglement as measured by concurrence for two noisy qubits that have dipole-dipole interaction. The nonlocal entanglement created by the dipole-dipole interaction is found to be protected from sudden death for certain initial states.