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The European Physical Journal D

, Volume 64, Issue 2–3, pp 549–555 | Cite as

Dynamics of quantum discord in two Tavis-Cummings models with classical driving fields

  • Y. Q. Zhang
  • J. B. Xu
Regular Article Quantum Information

Abstract

We investigate the dynamics of quantum discord in a system consisting of two Tavis-Cummings models, each of which contains two atoms driven by a classical field. We compare the dynamics of quantum discord for the system with that of entanglement and show that quantum discord vanishes only asymptotically although entanglement disappears suddenly during the time evolution. Furthermore, we examine the influence of the initial states and the classical field on the discord dynamics and find that the value of quantum discord can be improved by adjusting the classical driving field. Finally, the quantum discord of two atoms in dissipative cavity is also discussed.

Keywords

Entangle State Quantum Correlation Cavity Mode Quantum Discord Entanglement Sudden Death 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.Zhejiang Institute of Modern Physics and Physics DepartmentZhejiang UniversityHangzhouP.R. China

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