学术探索
学术期刊
新闻热点
数据分析
智能评审

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
收藏
页数：5
相关论文
共 26 条
[1]  
Bennett CH, 1996, PHYS REV A, V54, P3824, DOI 10.1103/PhysRevA.54.3824
[2]   Purification of noisy entanglement and faithful teleportation via noisy channels [J].
Bennett, CH ;
Brassard, G ;
Popescu, S ;
Schumacher, B ;
Smolin, JA ;
Wootters, WK .
PHYSICAL REVIEW LETTERS, 1996, 76 (05) :722-725
[3]   Quantum communication through an unmodulated spin chain [J].
Bose, S .
PHYSICAL REVIEW LETTERS, 2003, 91 (20)
[4]   Quantum communication through spin chain dynamics: an introductory overview [J].
Bose, Sougato .
CONTEMPORARY PHYSICS, 2007, 48 (01) :13-30
[5]   Quantum state transfer and time-dependent disorder in quantum chains [J].
Burgarth, D. .
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS, 2007, 151 (1) :147-155
[6]   Physical optimization of quantum error correction circuits [J].
Burkard, G ;
Loss, D ;
DiVincenzo, DP ;
Smolin, JA .
PHYSICAL REVIEW B, 1999, 60 (16) :11404-11416
[7]   Spin quantum computation in silicon nanostructures [J].
Das Sarma, S ;
de Sousa, R ;
Hu, XD ;
Koiller, B .
SOLID STATE COMMUNICATIONS, 2005, 133 (11) :737-746
[8]   Cloning transformations in spin networks without external control [J].
De Chiara, G ;
Fazio, R ;
Macchiavello, C ;
Montangero, S ;
Palma, GM .
PHYSICAL REVIEW A, 2005, 72 (01)
[9]   Quantum privacy amplification and the security of quantum cryptography over noisy channels [J].
Deutsch, D ;
Ekert, A ;
Jozsa, R ;
Macchiavello, C ;
Popescu, S ;
Sanpera, A .
PHYSICAL REVIEW LETTERS, 1996, 77 (13) :2818-2821
[10]   Entanglement purification and quantum error correction [J].
Duer, W. ;
Briegel, H. J. .
REPORTS ON PROGRESS IN PHYSICS, 2007, 70 (08) :1381-1424
123