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International Journal of Theoretical Physics

, Volume 51, Issue 11, pp 3637–3646 | Cite as

Quantum Discord for Two-Qubit System in a Symmetry-Broken Environment

  • Jing Nie
  • Xiuyi Yang
  • Chong Li
Article
  • 239 Downloads

Abstract

In contrast with the entanglement, we study the quantum discord dynamics of the two-qubit system in a symmetry-broken environment consisting of a fermionic bath. The quantum discord decay induced by the bath is analysed. By considering the two qubits that are initially prepared in the different X-states, we find that the behaviors of quantum discord and entanglement are different, the robustness of quantum discord depends on the initial state prepared in.

Keywords

Quantum discord Symmetry-broken environment Entanglement 

Notes

Acknowledgements

This work was partially supported by the CNSF (grant No. 60703100, and No. 10575017) and the Fundamental Research Funds for the Central Universities No. DUT10LK10.

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.School of ScienceLiaoning University of Science and TechnologyAnshanChina
  2. 2.School of Physics and Optoelectronic TechnologyDalian University of TechnologyDalianChina

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