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Influence of Interaction Between Qubits on Entanglement Sudden Death and Birth

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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).

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Authors and Affiliations

  1. College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang, Jiangxi, 33022, China

    Y. H. Ji, Z. S. Wang & J. J. Hu

  2. Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang, Jiangxi, 330022, China

    Y. H. Ji, Z. S. Wang & J. J. Hu

Authors
  1. Y. H. Ji
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  2. Z. S. Wang
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  3. J. J. Hu
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Correspondence to Y. H. Ji.

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Ji, Y.H., Wang, Z.S. & Hu, J.J. Influence of Interaction Between Qubits on Entanglement Sudden Death and Birth. Int J Theor Phys 50, 644–653 (2011). https://doi.org/10.1007/s10773-010-0588-7

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  • DOI: https://doi.org/10.1007/s10773-010-0588-7

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