Chinese Journal of Quantum Electronics, Volume. 32, Issue 4, 438(2015)

Optimal phase-covariant quantum cloning

Gang ZHANG1,*... Guozhu PAN2 and Hao YUAN2 |Show fewer author(s)
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  • 1[in Chinese]
  • 2[in Chinese]
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    In quantum information science, quantum cloning theory is a basic one that provides an absolute security of quantum cryptography. The explicit transformation of the optimal 1→M=d+1 phase-covariant quantum cloning in d dimensions was derived and then this kind of cloning machine to the 1→M=kd+1 (for integer k) case was generized and the explicit transformation was obtained. By exploiting the formulation of the nonoptimal 2→M=2k+1 phase-covariant quantum cloning in 2 dimensions, the optimal cloning transformation was derived. The copy fidelities of the two kinds of cloning machines are coincident with the theoretical values found.

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    ZHANG Gang, PAN Guozhu, YUAN Hao. Optimal phase-covariant quantum cloning[J]. Chinese Journal of Quantum Electronics, 2015, 32(4): 438

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    Paper Information

    Received: Apr. 1, 2015

    Accepted: --

    Published Online: Nov. 30, 2015

    The Author Email: Gang ZHANG (zhanggang@wxc.edu.cn)

    DOI:10.3969/j.issn.1007-5461.2015.04.009

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