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Efficient multipartite entanglement concentration protocol for nitrogen-vacancy center and microresonator coupled systems

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Abstract

Here in this study we propose an efficient entanglement concentration protocol (ECP) for separate nitrogen-vacancy (NV) centers, resorting to the single-photon input–output process of the NV center and microtoroidal resonator coupled system. In the proposed ECP, one ancillary single-photon is prepared and passed through a hybrid quantum circuit. By measuring the photon under the suitable polarization basis, maximally entangled state between the separate NV centers can be obtained with a certain success probability. The solid entanglement will be preserved during the process, which can be iterated several rounds to obtain an optimal total success probability. We also discuss the experimental feasibility of the protocol by considering current technologies, and we believe that the protocol is useful in the future applications of long-distance quantum communication and distributed quantum computation.

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Acknowledgments

This work is supported by China National Natural Science Foundation Grant Nos. 61471050, No. 61377097, and No. 11404031, Beijing Higher Education Young Elite Teacher Project No. YETP0456, and the Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University Grant No. KF201301.

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Authors and Affiliations

  1. School of Science, Beijing University of Posts and Telecommunications, Beijing,  100876, China

    Cong Cao, Hao Ding, Yin Li, Tie-Jun Wang, Si-Chen Mi, Ru Zhang & Chuan Wang

  2. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing,  100876, China

    Chuan Wang

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  1. Cong Cao
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  2. Hao Ding
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  3. Yin Li
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Correspondence to Chuan Wang.

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Cao, C., Ding, H., Li, Y. et al. Efficient multipartite entanglement concentration protocol for nitrogen-vacancy center and microresonator coupled systems. Quantum Inf Process 14, 1265–1277 (2015). https://doi.org/10.1007/s11128-015-0924-1

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