Purifying entanglement of noisy two-qubit states via entanglement swapping

被引：17

作者：

Song, Wei ^{[1
]}

Yang, Ming ^{[2
]}

Cao, Zhuo-Liang ^{[1
]}

机构：

[1] Hefei Normal Univ, Sch Elect & Informat Engn, Hefei 230601, Peoples R China

[2] Anhui Univ, Sch Phys & Mat Sci, Hefei 230601, Peoples R China

来源：

PHYSICAL REVIEW A | 2014年 / 89卷 / 01期

基金：

中国国家自然科学基金;

关键词：

PURIFICATION;

D O I：

10.1103/PhysRevA.89.014303

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Two qubits in pure entangled states going through separate paths and interacting with their own individual environments will gradually lose their entanglement. Here we show that the entanglement change of a two-qubit state due to amplitude damping noises can be recovered by entanglement swapping. Some initial states can be asymptotically purified into maximally entangled states by iteratively using our protocol.

引用

页数：5

共 31 条

[1] Manipulating and protecting entanglement by means of spin environments [J].

Apollaro, T. J. G. ;

Cuccoli, A. ;

Di Franco, C. ;

Paternostro, M. ;

Plastina, F. ;

Verrucchi, P. .

NEW JOURNAL OF PHYSICS, 2010, 12

[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] Purification via entanglement swapping and conserved entanglement [J].

Bose, S ;

Vedral, V ;

Knight, PL .

PHYSICAL REVIEW A, 1999, 60 (01) :194-197

[4] Quantum repeaters:: The role of imperfect local operations in quantum communication [J].

Briegel, HJ ;

Dür, W ;

Cirac, JI ;

Zoller, P .

PHYSICAL REVIEW LETTERS, 1998, 81 (26) :5932-5935

[5] 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

[6] Entanglement purification of Gaussian continuous variable quantum states [J].

Duan, LM ;

Giedke, G ;

Cirac, JI ;

Zoller, P .

PHYSICAL REVIEW LETTERS, 2000, 84 (17) :4002-4005

[7] Multiparticle entanglement purification for graph states -: art. no. 107903 [J].

Dür, W ;

Aschauer, H ;

Briegel, HJ .

PHYSICAL REVIEW LETTERS, 2003, 91 (10) :107903-107903

[8]

Fan H., ARXIV09033791

[9] Channel-Adapted Quantum Error Correction for the Amplitude Damping Channel [J].

Fletcher, Andrew S. ;

Shor, Peter W. ;

Win, Moe Z. .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2008, 54 (12) :5705-5718

[10] Multistage entanglement swapping [J].

Goebel, Alexander M. ;

Wagenknecht, Claudia ;

Zhang, Qiang ;

Chen, Yu-Ao ;

Chen, Kai ;

Schmiedmayer, Joerg ;

Pan, Jian-Wei .

PHYSICAL REVIEW LETTERS, 2008, 101 (08)

← 1 2 3 4 →