Quantum discord dynamics in structured reservoirs

TL;DR

This paper investigates how quantum discord evolves over time in two-qubit systems interacting with structured reservoirs, analyzing effects of temperature and reservoir characteristics on the dynamics.

Contribution

It derives non-Markovian master equations for quantum discord dynamics in systems with common and independent reservoirs, highlighting temperature effects and reservoir parameters.

Findings

Quantum discord dynamics show similar features at high and zero temperatures.

Reservoir spectra and resonant parameters significantly influence discord evolution.

The study provides insights into non-Markovian effects on quantum correlations.

Abstract

The non-Markovian master equations are derived to study quantum discord dynamics of two qubits coupled to a common reservoir and two independent reservoirs, respectively. We compare the dynamics under different parameters, such as reservoir spectra and resonant parameters, at high temperature and at zero temperature. The results indicate that the dynamics at these two extreme temperatures share similar characters, as well as differences.