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Title of Journal: Int J Theor Phys

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Abbravation: International Journal of Theoretical Physics

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Springer US

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DOI

10.1007/s11740-012-0368-8

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1572-9575

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Optimal Measurement Basis for Economical Phasecov

Authors: Zhujun Jia
Publish Date: 2011/05/10
Volume: 50, Issue: 10, Pages: 3049-
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Abstract

Recently Wang and Yang Phys Rev A 79062315 2009 presented a scheme for economical phasecovariant telecloning of qubits with Wclass 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 twoqubit 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 Bellbasis is the optimal measurement basis in terms of the average fidelity of the clones although the specialbasis measurement can lead to the suboptimal fidelity with a certain probability

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