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The Dynamics of Quantum Entanglement and General Quantum Correlations in the Double Tavis-Cumming Model

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Abstract

We study the dynamics of quantum correlations involving entanglement and discord of two pairs of two-level atoms in cavity QED. In the model, two atoms A and C are coupled with a single-mode cavity field via Tavis-Cumming interaction at one location, and the same for B and D at another location. The two locations are connected by the entanglement of the atoms AB and CD while there are no any direct interactions between them. Through comparing the robustness of entanglement and discord of the atoms in various initial conditions of cavities, it is shown the discord is more robust than the entanglement and would be useful in quantum information technology.

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Authors and Affiliations

  1. Opto-Electronic Engineering College, Zaozhuang University, Zaozhuang, 277160, China

    Qing-Jun Xu & Shi-Ying Zhang

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  1. Qing-Jun Xu
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  2. Shi-Ying Zhang
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Correspondence to Qing-Jun Xu.

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Xu, QJ., Zhang, SY. The Dynamics of Quantum Entanglement and General Quantum Correlations in the Double Tavis-Cumming Model. Int J Theor Phys 55, 1438–1446 (2016). https://doi.org/10.1007/s10773-015-2783-z

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  • DOI: https://doi.org/10.1007/s10773-015-2783-z

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