Implementing 2→M Phase-covariant Cloning in Spin Networks

被引：1

作者：

Wu, Lei ^{[1
]}

Zhu, Ai-Dong ^{[1
,2
,3
]}

Yeon, Kyu-Hwang ^{[2
,3
]}

Yu, Seong-Cho ^{[2
,3
]}

机构：

[1] Yanbian Univ, Dept Phys, Coll Sci, Yanjin 133002, Jilin, Peoples R China

[2] Chungbuk Natl Univ, Phys Program BK21, Cheongju 361763, Chungbuk, South Korea

[3] Chungbuk Natl Univ, Dept Phys, Coll Nat Sci, Cheongju 361763, Chungbuk, South Korea

来源：

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2010年 / 49卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Quantum cloning; Spin network; Fidelity; Magnetic field; QUANTUM CLONING;

D O I：

10.1007/s10773-009-0235-3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a scheme to implement 2 -> M phase-covariant quantum cloning machine by using a M+2 spin star network in which the two central spins interact with the M outer spins respectively. The effect of the magnetic field on the fidelity of the cloning is also investigated. By applying an external magnetic field on the spin system, the fidelity of the cloning machine can be largely improved.

引用

页码：542 / 548

页数：7

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