One-to-Many Economical Phase-Covariant Cloning and Telecloning of Qudits
WANG Xin-Wen1,2, SU Yu-Huan2, YANG Guo-Jian2
1Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008 2Department of Physics, Beijing Normal University, Beijing 100875
One-to-Many Economical Phase-Covariant Cloning and Telecloning of Qudits
WANG Xin-Wen1,2, SU Yu-Huan2, YANG Guo-Jian2
1Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008 2Department of Physics, Beijing Normal University, Beijing 100875
摘要We present explicit unitary transformations for realizing both symmetric and asymmetric one-to-many economical phase-covariant clonings of qudits. We also propose a corresponding telecloning scheme. It is shown that the fidelity of the telecloning with nonmaximally entangled states can be larger than that of the corresponding cloning. This implies that partially entangled states can be better than the maximally entangled states for our economical phase-covariant telecloning scheme.
Abstract：We present explicit unitary transformations for realizing both symmetric and asymmetric one-to-many economical phase-covariant clonings of qudits. We also propose a corresponding telecloning scheme. It is shown that the fidelity of the telecloning with nonmaximally entangled states can be larger than that of the corresponding cloning. This implies that partially entangled states can be better than the maximally entangled states for our economical phase-covariant telecloning scheme.
WANG Xin-Wen;SU Yu-Huan;YANG Guo-Jian. One-to-Many Economical Phase-Covariant Cloning and Telecloning of Qudits[J]. 中国物理快报, 2010, 27(10): 100303-100303.
WANG Xin-Wen, SU Yu-Huan, YANG Guo-Jian. One-to-Many Economical Phase-Covariant Cloning and Telecloning of Qudits. Chin. Phys. Lett., 2010, 27(10): 100303-100303.
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2010, Vol. 27 
