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Enhanced tripartite entanglement via atomic coherence in atom-optomechanical system

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Abstract

We present a scheme to greatly enhance tripartite entanglement in an atom-optomechanical hybrid system driven by a single input laser field. The enhancement of the tripartite entanglement among two longitudinal cavity modes and a mirror oscillation mode is realized via atomic coherence when the cavity free spectral range is about equal to twice the frequency of mechanical oscillation and both cavity modes are blue-detuned by the mechanical frequency to the respective atomic resonant transitions while keeping the two-photon resonance satisfied. Moreover, the entanglement between the two cavity modes exhibits robustness to the variation of the environment temperature. The present atom-assisted optomechanical system provides an alternative platform for the quantum state exchange between light and light, as well as light and matter.

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Authors and Affiliations

  1. Department of Physics, Shanghai University, Shanghai, P.R. China

    Xuping Shao, Zhiyong Yin, Zhenghong Li & Xihua Yang

  2. School of Science, Nantong University, Nantong, P.R. China

    Xuping Shao

  3. Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University, Shanghai, P.R. China

    Xuping Shao, Zhiyong Yin, Zhenghong Li & Xihua Yang

Authors
  1. Xuping Shao
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  2. Zhiyong Yin
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  3. Zhenghong Li
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  4. Xihua Yang
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Correspondence to Xihua Yang.

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Shao, X., Yin, Z., Li, Z. et al. Enhanced tripartite entanglement via atomic coherence in atom-optomechanical system. Eur. Phys. J. D 73, 247 (2019). https://doi.org/10.1140/epjd/e2019-100390-2

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  • DOI: https://doi.org/10.1140/epjd/e2019-100390-2

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