Entanglement purification without controlled-NOT gates by using the natural dynamics of spin chains

被引：21

作者：

Maruyama, Koji ^{[1
,2
]}

Nori, Franco ^{[1
,2
,3
]}

机构：

[1] RIKEN, Adv Sci Inst, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

[3] Univ Michigan, Ctr Theoret Phys, Dept Phys, Ctr Study Complex Syst, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW A | 2008年 / 78卷 / 02期

基金：

日本科学技术振兴机构; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevA.78.022312

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a simple protocol to purify bipartite entanglement in spin-1/2 particles by utilizing only natural spin-spin interactions, i.e., those that can commonly be realized in. realistic physical systems and S, measurements on single spins. Even the standard isotropic Heisenberg interaction is shown to be sufficient to purify mixed state entanglement. Our protocol does not need controlled-NOT (CNOT) gates that are very hard to implement experimentally. This approach could be useful for quantum-information processing in solid-statebased systems.

引用

页数：5

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