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International Journal of Theoretical Physics

, Volume 50, Issue 3, pp 644–653 | Cite as

Influence of Interaction Between Qubits on Entanglement Sudden Death and Birth

  • Y. H. Ji
  • Z. S. Wang
  • J. J. Hu
Article

Abstract

Dynamic evolution of entanglement is studied for coupling two-qubit system in non-Markov environment in terms of concurrence. We find that the degree of entanglement depends on the initial quantum state of the system and the interaction between the two-qubit system and the environment. When the interaction between the qubits and the environment is completely symmetric, especially, the environment has no effect on the entanglement, where the decoherence is entirely resulted from the interaction between qubits. By controlling the coupling way of the interaction, thus, one may avoid the entanglement sudden death (ESD).

Keywords

Entanglement Interaction Symmetry Concurrence 

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.College of Physics and Communication ElectronicsJiangxi Normal UniversityNanchangChina
  2. 2.Key Laboratory of Optoelectronic and Telecommunication of JiangxiNanchangChina

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