Scalable implementation of ancilla-free optimal 1 → M phase-covariant quantum cloning by combining quantum Zeno dynamics and adiabatic passage

被引：2
|
作者：
Shao, Xiao-Qiang [1 ]
Zheng, Tai-Yu [1 ]
Zhang, Shou [2 ]
机构：
[1] NE Normal Univ, Sch Phys, Changchun 130024, Peoples R China
[2] Yanbian Univ, Coll Sci, Dept Phys, Yanji 133002, Jilin, Peoples R China
来源：
PHYSICS LETTERS A | 2011年 / 375卷 / 40期
基金：
中国国家自然科学基金;
关键词：
Quantum cloning; Quantum Zeno dynamics; CRYPTOGRAPHY; MACHINES;
D O I：
10.1016/j.physleta.2011.08.012
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A scalable way for implementation of ancilla-free optimal 1 -> M phase-covariant quantum cloning (PCC) is proposed by combining quantum Zeno dynamics and adiabatic passage. An optimal 1 -> M PCC can be achieved directly from the existed optimal 1 -> (M - 1) PCC without excited states population during the whole process. The cases for optimal 1 -> 3 (4) PCCs are discussed detailedly to show that the scheme is robust against the effect of decoherence. Moreover, the time for carrying out each cloning transformation is regular, which may reduce the complexity for achieving the optimal PCC in experiment. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：3504 / 3508
页数：5
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