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Interference-induced enhancement of field entanglement in a microwave-driven V-type single-atom laser

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Central European Journal of Physics

Abstract

We demonstrate the generation of two-mode continuous-variable (CV) entanglement in a V-type three-level atom trapped in a doubly resonant cavity using a microwave field driving a hyperfine transition between two upper excited states. By numerically simulating the dynamics of this system, our results show that the CV entanglement with large mean number of photons can be generated even in presence of the atomic relaxation and cavity losses. More interestingly, it is found that the intensity and period of entanglement can be enhanced significantly with the increasing of the atomic relaxation due to the existence of the perfect spontaneously generated interference between two atomic decay channels. Moreover, we also show that the entanglement can be controlled efficiently by tuning the intensity of spontaneously generated interference and the detuning of the cavity field.

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Authors and Affiliations

  1. Department of Physics, Southeast University, Nanjing, 210096, China

    Wen-Xing Yang, Ting-Ting Zha & Yanfeng Bai

  2. Institute of Photonics Technologies, National Tsing-Hua University, Hsinchu, 300, Taiwan

    Wen-Xing Yang & Ray-Kuang Lee

  3. Department of Applied Physics, School of Basic Science, East China Jiaotong University, Nanchang, 330013, China

    Ai-Xi Chen

Authors
  1. Wen-Xing Yang
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  2. Ai-Xi Chen
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  3. Ting-Ting Zha
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  4. Yanfeng Bai
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  5. Ray-Kuang Lee
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Correspondence to Wen-Xing Yang.

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Yang, WX., Chen, AX., Zha, TT. et al. Interference-induced enhancement of field entanglement in a microwave-driven V-type single-atom laser. centr.eur.j.phys. 12, 737–743 (2014). https://doi.org/10.2478/s11534-014-0510-7

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  • DOI: https://doi.org/10.2478/s11534-014-0510-7

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