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Optimal Measurement Basis for Economical Phase-covariant Telecloning with Partially Entangled States

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Abstract

Recently, Wang and Yang (Phys. Rev. A 79:062315, 2009) presented a scheme for economical phase-covariant telecloning of qubits with W-class entangled states. For realizing probabilistically the suboptimal telecloning in the case that the sender’s subsystem and the receivers’ subsystem are partially entangled, they introduced a special two-qubit measurement basis. I here study the effects of the sender’s different measurements on the fidelity of the clones in such a scheme, and obtain several interesting results. The most important result is that Bell-basis is the optimal measurement basis in terms of the average fidelity of the clones, although the special-basis measurement can lead to the suboptimal fidelity with a certain probability.

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Authors and Affiliations

  1. Department of Physics, Hunan University of Science and Engineering, Yongzhou, 425100, China

    Zhujun Jia

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  1. Zhujun Jia
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Correspondence to Zhujun Jia.

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Jia, Z. Optimal Measurement Basis for Economical Phase-covariant Telecloning with Partially Entangled States. Int J Theor Phys 50, 3049–3053 (2011). https://doi.org/10.1007/s10773-011-0805-z

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  • DOI: https://doi.org/10.1007/s10773-011-0805-z

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