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Preparation of entanglement between atoms in spatially separated cavities via fiber loss

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Abstract

We propose a scheme to prepare a maximally entangled state for two Λ-type atoms trapped in separate optical cavities coupled through an optical fiber based on the combined effect of the unitary dynamics and the dissipative process. Our work shows that the fiber loss, as well as the atomic spontaneous emission and the cavity decay, is no longer undesirable, but requisite to prepare the distributed entanglement, which is meaningful for the long distance quantum information processing tasks. Originating from an arbitrary state, the desired state could be prepared without precise time control. The robustness of the scheme is numerically demonstrated by considering various parameters.

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Authors and Affiliations

  1. Department of Physics, Harbin Institute of Technology, Harbin, 150001, P.R. China

    Shi-Lei Su, Qi Guo & Shou Zhang

  2. Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun, 130024, P.R. China

    Xiao-Qiang Shao

  3. School of Physics and Information Engineering, Shanxi Normal University, Linfen, 041004, Shanxi, P.R. China

    Liu-Yong Cheng

  4. Department of Physics, College of Science, Yanbian University, Yanji, Jilin, 133002, P.R. China

    Hong-Fu Wang & Shou Zhang

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  1. Shi-Lei Su
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Correspondence to Shou Zhang.

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Su, SL., Shao, XQ., Guo, Q. et al. Preparation of entanglement between atoms in spatially separated cavities via fiber loss. Eur. Phys. J. D 69, 123 (2015). https://doi.org/10.1140/epjd/e2015-50901-6

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