Quantum Correlations in non-Markovian Environments

TL;DR

This paper investigates how quantum correlations like entanglement, discord, and nonlocality evolve in three-qubit systems within noisy environments, revealing discord's robustness against decay compared to other correlations.

Contribution

It provides an analytical comparison of Markovian and non-Markovian dynamics of quantum correlations in three-qubit systems, highlighting discord's immunity to death.

Findings

Quantum discord remains stable in noisy environments.

Entanglement and Bell nonlocality decay faster than discord.

Non-Markovian effects influence the dynamics of quantum correlations.

Abstract

We have studied the analytical Markovian and non-Markovian dynamics of quantum correlations, such as entanglement, quantum discord and Bell nonlocalities for three noisy qubits. Quantum correlation as measured by quantum discord is found to be immune to death contrary to entanglement and Bell nonlocality for initial GHZ- or W-type mixed states.