Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1862466 | Physics Letters A | 2007 | 5 Pages |
Abstract
We derive the explicit transformation of the optimal symmetric economical 1âM phase-covariant quantum cloning machine (EPCCM), which works without ancilla, as well as the corresponding fidelities in 2-dimension. The fidelity (1âM=2k+1EPCCM) is covered with previous contributions [G.M. D'Ariano, et al., Phys. Rev. A 71 (2005) 042327]. Meanwhile, the explicit transformation of the optimal symmetric 1âM phase-covariant quantum cloning machine (PCCM) (working with ancilla) as well as the corresponding fidelities in 2-dimension is also derived. The results of the PCCM agree with previous contributions [H. Fan, et al., Phys. Rev. A 65 (2001) 012304].
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Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Wen-Hai Zhang, Long-Bao Yu, Liu Ye, Jie-Lin Dai,