The evolution and stability of quantum correlations in dissipative cavity

Abstract

We investigate the dynamics of quantum correlations such as entanglement and quantum discord between two atoms in a lossy cavity. It is found that a stable quantum discord could be induced even when the atoms remain separable at all times. Also, we show that it is possible to amplify and protect the quantum discord under cavity decay for certain types of initial states. Moreover, entanglement decoherence-free subspaces are obtained which may be useful in quantum information and quantum computation.

Keywords:

• quantum discord
• entanglement
• coupled cavities

Acknowledgement

This work was supported by the Fundamental Research Funds for the Central Universities (12QN30).