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Controllable coupling of distributed qubits within a microtoroidal cavity network

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Abstract

We propose a scheme to control the coupling between two arbitrary atoms scattered within a quantum network composed of microtoroidal cavities linked by a ring-fibre. The atom-atom effective couplings are induced by pairing of off-resonant Raman transitions. The couplings can be arbitrarily controlled by adjusting classical fields. Compared with the previous scheme [S.B. Zheng, C.P. Yang, F. Nori, Phys. Rev. A 82, 042327 (2010)], the present scheme uses microtoroidal cavities with higher coupling efficiency than Fabry-Perot cavities. Furthermore, the scheme is not only suitable for the short-fibre limit, but also for multiple fibre modes. The added fibre modes can play a positive role, especially when the coupling rate between cavity-mode and fibre-mode is not large. In addition, a wider frequency domain of fibre modes can be used in this scheme.

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Authors and Affiliations

  1. Department of Physics, Fuzhou University, Fuzhou, 350002, P.R. China

    C. Hu & Y. Xia

  2. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024, P.R. China

    Y. Xia

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

    J. Song

Authors
  1. C. Hu
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  2. Y. Xia
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  3. J. Song
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Correspondence to Y. Xia.

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Hu, C., Xia, Y. & Song, J. Controllable coupling of distributed qubits within a microtoroidal cavity network. Eur. Phys. J. D 66, 122 (2012). https://doi.org/10.1140/epjd/e2012-20604-9

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  • DOI: https://doi.org/10.1140/epjd/e2012-20604-9

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