Enhancement of quantum correlations for the system of cavity QED by applying bang-bang pulses

TL;DR

This paper presents a method using bang-bang pulses to enhance quantum correlations like discord and entanglement in a cavity QED system with two atoms, improving their quantum information properties.

Contribution

The study introduces a scheme to increase quantum correlations in cavity QED systems through the application of bang-bang pulses, demonstrating their positive effect on quantum discord and entanglement.

Findings

Quantum discord and entanglement can be increased with bang-bang pulses.

Bang-bang pulses influence the dynamics of quantum correlations.

Quantum mutual information and classical correlation are also affected.

Abstract

We propose a scheme of increasing quantum correlations for the cavity quantum electrodynamics system consisting of two noninteracting two-level atoms each locally interacting with its own quantized field mode by bang-bang pulses. We investigate the influence of the bang-bang pulses on the dynamics of quantum discord, entanglement, quantum mutual information and classical correlation between the two atoms. It is shown that the amount of quantum discord and entanglement of the two atoms can be improved by applying the bang-bang pulses.