Chinese Journal of Quantum Electronics, Volume. 28, Issue 5, 583(2011)

A class of optimal phase-covariant quantum cloning

Wen-hai ZHANG1...2,*, Jie-lin DAI3, Zhuo-liang CAO2,3 and Ming YANG2 |Show fewer author(s)
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  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
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    The phase-covariant quantum cloning has an important application in quantum cryptography. By exploiting a general unitary transformation, the fidelity of clones is derived. The result shows that there exists a class of optimal phase-covariant quantum cloning. For these explicit transformations of the phase-covariant quantum cloning, the fidelity of clones is maximal and equal. Based on the cavity quantum electrodynamics, a scheme to implement the transformations of quantum cloning is proposed.

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    ZHANG Wen-hai, DAI Jie-lin, CAO Zhuo-liang, YANG Ming. A class of optimal phase-covariant quantum cloning[J]. Chinese Journal of Quantum Electronics, 2011, 28(5): 583

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    Paper Information

    Received: Sep. 25, 2010

    Accepted: --

    Published Online: Sep. 27, 2011

    The Author Email: Wen-hai ZHANG (zhangwenhaianhui@yahoo.com.cn)

    DOI:10.3969/j.issn.1007-5461. 2011.05.012

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