Realization of a general quantum cloning machine via cavity-assisted interaction

被引：14
|
作者：
Fang, B. -L. [1 ,2 ]
Wu, T. [1 ,3 ]
Ye, L. [1 ]
机构：
[1] Anhui Univ, Key Lab Optoelect Informat Acquisit & Manipulat, Hefei 230039, Peoples R China
[2] Hefei Univ, Dept Math & Phys, Hefei 230022, Peoples R China
[3] Fu Yang Teachers Coll, Sch Phys & Elect Sci, Fuyang 236037, Peoples R China
来源：
EPL | 2012年 / 97卷 / 06期
基金：
美国国家科学基金会;
关键词：
ENTANGLEMENT; DIMENSION; LIGHT;
D O I：
10.1209/0295-5075/97/60002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a scheme to realize a general quantum cloning machine via cavity-assisted interaction. First, this scheme can prepare entangled states of three remote trapped atoms including the W state and the GHZ state. Based on this approach, the quantum information carried by a photon pulse or a trapped atom can be copied to other two trapped atoms. According to the known information of the initial state, the equipment can provide the optimal symmetric (asymmetric) universal and phase-covariant quantum cloning. Further, via the cavity input-output process, the quantum cloning can be realized with high fidelity, even if the atom is not localized in the Lamb-Dicke regime. Copyright (C) EPLA, 2012
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页数：6
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