Entanglement purification of multi-mode quantum states

被引：1
作者：
Clausen, J [1 ]
Knöll, L [1 ]
Welsch, DG [1 ]
机构：
[1] Univ Jena, Inst Theoret Phys, D-07743 Jena, Germany
来源：
JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS | 2003年 / 5卷 / 06期
关键词：
quantum communication and computing; entanglement and quantum nonlocality; entanglement purification; nonclassical field states; decoherence; cross-keff interaction; state reconstruction;
D O I：
10.1088/1464-4266/5/6/004
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An iterative random procedure is considered allowing entanglement purification of a class of multi-mode quantum states. In certain cases, complete purification may be achieved using only a single signal state preparation. A physical implementation based on beam splitter arrays and non-linear elements is suggested. The influence of loss is analysed in the example of purification of entangled N-mode coherent states.
引用
收藏
页码：S561 / S566
页数：6
相关论文
共 25 条
[1]  
[Anonymous], 1993, Quantum Theory: Concepts and Methods, Fundamental Theories of Physics
[2]   Private entanglement over arbitrary distances, even using noisy apparatus [J].
Aschauer, H ;
Briegel, HJ .
PHYSICAL REVIEW LETTERS, 2002, 88 (04) :4-479024
[3]   Phase measurement by projection synthesis [J].
Barnett, SM ;
Pegg, DT .
PHYSICAL REVIEW LETTERS, 1996, 76 (22) :4148-4150
[4]  
Bennett CH, 1996, PHYS REV A, V54, P3824, DOI 10.1103/PhysRevA.54.3824
[5]   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
[6]   Entanglement purification of unknown quantum states [J].
Brun, TA ;
Caves, CM ;
Schack, R .
PHYSICAL REVIEW A, 2001, 63 (04) :1-10
[7]   Measuring quantum state overlaps of traveling optical fields [J].
Clausen, J ;
Dakna, M ;
Knöll, L ;
Welsch, DG .
OPTICS COMMUNICATIONS, 2000, 179 (1-6) :189-196
[8]   Lossy purification and detection of entangled coherent states -: art. no. 062303 [J].
Clausen, J ;
Knöll, L ;
Welsch, DG .
PHYSICAL REVIEW A, 2002, 66 (06) :12
[9]   Quantum state conversion by cross-Kerr interaction [J].
Clausen, J ;
Knöll, L ;
Welsch, DG .
JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, 2002, 4 (02) :155-163
[10]   State measurement by photon filtering in a ring cavity [J].
D'Ariano, GM ;
Maccone, L ;
Paris, MGA ;
Sacchi, MF .
MODERN PHYSICS LETTERS B, 2000, 14 (01) :15-22
123