Purifying entanglement of noisy two-qubit states via entanglement swapping

被引：18

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 29 条

[1] Purifying two-qubit entanglement in nonidentical decoherence by employing weak measurements [J].

Shi, Jia-Dong ;

Xu, Shuai ;

Ma, Wen-Chao ;

Song, Xue-Ke ;

Ye, Liu .

QUANTUM INFORMATION PROCESSING, 2015, 14 (04) :1387-1397

[2] Entanglement universality of two-qubit X-states [J].

Mendonca, Paulo E. M. F. ;

Marchiolli, Marcelo A. ;

Galetti, Diogenes .

ANNALS OF PHYSICS, 2014, 351 :79-103

[3] Relative entropy of entanglement of two-qubit 'X' states [J].

Huang Jie-Hui ;

Liu Nian-Hua ;

Liu Jiang-Tao ;

Yu Tian-Bao ;

He Xian .

CHINESE PHYSICS B, 2010, 19 (11)

[4] Interferometric distillation and determination of unknown two-qubit entanglement [J].

Lee, S. -S. B. ;

Sim, H. -S. .

PHYSICAL REVIEW A, 2009, 79 (05)

[5] Entanglement dynamics of three-qubit states in noisy channels [J].

Siomau, M. ;

Fritzsche, S. .

EUROPEAN PHYSICAL JOURNAL D, 2010, 60 (02) :397-403

[6] A Three-Qubit State Entanglement Concentration Protocol Assisted by Two-Qubit Systems [J].

Choudhury, Binayak S. ;

Dhara, Arpan .

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, 2013, 52 (11) :3965-3969

[7] Quantifying entanglement of a two-qubit system via measurable and invariant moments of its partially transposed density matrix [J].

Bartkiewicz, Karol ;

Beran, Jiri ;

Lemr, Karel ;

Norek, Michal ;

Miranowicz, Adam .

PHYSICAL REVIEW A, 2015, 91 (02)

[8] Operator Entanglement of Two-Qubit Joint Unitary Operations Revisited: Schmidt Number Approach [J].

Xia, Hui-Zhi ;

Li, Chao ;

Yang, Qing ;

Yang, Ming ;

Cao, Zhuo-Liang .

BRAZILIAN JOURNAL OF PHYSICS, 2012, 42 (3-4) :167-171

[9] Entanglement concentration of unknown states on separate nitrogen-vacancy centers via error-detected entanglement swapping [J].

Cao, Cong ;

Liu, Xiao-Hu ;

Duan, Yu-Wen ;

Chen, Xi ;

Zhang, Ru .

LASER PHYSICS, 2017, 27 (05)

[10] Concentration of Non-maximally Entangled States via Entanglement Swapping in Cavity QED [J].

Wang, Xian-Cai ;

Yang, Ming .

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, 2011, 50 (05) :1479-1485

← 1 2 3 →