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Implementation of a Remote Three-Qubit Controlled-Z Gate via Quantum Zeno Dynamics

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Abstract

With the quantum Zeno dynamics, we propose a scheme for implementing the remote three-qubit controlled-Z gate with three Λ-type atoms trapped in three spatially separated cavities coupled by optical fibers. It can be implemented by one step and doesn’t require strong cavity-fiber coupling. Moreover, the influences of various decoherence processes, such as spontaneous emission and photon leakage of cavities and fibers, on the fidelity are also investigated by numerical calculation. The result shows that our scheme is robust against the decoherence and promising for the realization with current experimental technology.

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Acknowledgments

This work is supported by the Special Funds of the National Natural Science Foundation of China under Grant Nos. 11365011 and 11247032, by Natural Science Foundation of Jiangxi under Grants No. 20122BAB212004 and by Scientic Research Foundation of Jiangxi Provincial Education Department under Grants No. GJJ13383.

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Authors and Affiliations

  1. School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China

    Yan-Ling Li, Jin-Song Huang & Zhong-Hui Xu

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  1. Yan-Ling Li
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  2. Jin-Song Huang
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  3. Zhong-Hui Xu
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Correspondence to Yan-Ling Li.

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Li, YL., Huang, JS. & Xu, ZH. Implementation of a Remote Three-Qubit Controlled-Z Gate via Quantum Zeno Dynamics. Int J Theor Phys 54, 1680–1688 (2015). https://doi.org/10.1007/s10773-014-2369-1

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  • DOI: https://doi.org/10.1007/s10773-014-2369-1

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