Quantum partial teleportation as optimal cloning at a distance

被引:37
|
作者
Filip, R [1 ]
机构
[1] Palacky Univ, Dept Opt, Olomouc 77207, Czech Republic
来源
PHYSICAL REVIEW A | 2004年 / 69卷 / 05期
关键词
D O I
10.1103/PhysRevA.69.052301
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We propose a feasible scheme of conditional quantum partial teleportation of a qubit as optimal asymmetric cloning at a distance. In this scheme, Alice preserves one imperfect clone whereas other clone is teleported to Bob. Fidelities of the clones can be simply controlled by an asymmetry in Bell-state measurement. The optimality means that tightest inequality for the fidelities in the asymmetric cloning is saturated. Further we design a conditional teleportation as symmetric optimal N-->N+1 cloning from N Alice's replicas on single distant clone. We shortly discussed two feasible experimental implementations, first one for teleportation of polarization state of a photon and second one for teleportation of a time-bin qubit.
引用
收藏
页码:052301 / 1
页数:4
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