Measuring the entanglement of bipartite pure states

被引：45

作者：

Sancho, JMG

Huelga, SF

机构：

[1] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain

[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Opt Sect, London SW7 2BZ, England

来源：

PHYSICAL REVIEW A | 2000年 / 61卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.61.042303

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The problem of the experimental determination of the amount of entanglement of a bipartite pure state is addressed. We show that measuring a Single observable does nor suffice to determine the entanglement of a given unknown pure state of two particles. Possible minimal local measuring strategies are discussed, and a comparison is made on the basis of their best achievable precision.

引用

收藏

页数：7

相关论文

共 20 条

[1]

ACIN A, QUANTPH9911008

[2] TELEPORTING AN UNKNOWN QUANTUM STATE VIA DUAL CLASSICAL AND EINSTEIN-PODOLSKY-ROSEN CHANNELS [J].

BENNETT, CH ;

BRASSARD, G ;

CREPEAU, C ;

JOZSA, R ;

PERES, A ;

WOOTTERS, WK .

PHYSICAL REVIEW LETTERS, 1993, 70 (13) :1895-1899

[3] Concentrating partial entanglement by local operations [J].

Bennett, CH ;

Bernstein, HJ ;

Popescu, S ;

Schumacher, B .

PHYSICAL REVIEW A, 1996, 53 (04) :2046-2052

[4] Universal algorithm for optimal estimation of quantum states from finite ensembles via realizable generalized measurement [J].

Derka, R ;

Buzek, V ;

Ekert, AK .

PHYSICAL REVIEW LETTERS, 1998, 80 (08) :1571-1575

[5] Can quantum-mechanical description of physical reality be considered complete? [J].

Einstein, A ;

Podolsky, B ;

Rosen, N .

PHYSICAL REVIEW, 1935, 47 (10) :0777-0780

[6] QUANTUM CRYPTOGRAPHY BASED ON BELL THEOREM [J].

EKERT, AK .

PHYSICAL REVIEW LETTERS, 1991, 67 (06) :661-663

[7] Method of areas for manipulating the entanglement properties of one copy of a two-particle pure entangled state [J].

Hardy, L .

PHYSICAL REVIEW A, 1999, 60 (03) :1912-1923

[8] Improvement of frequency standards with quantum entanglement [J].

Huelga, SF ;

Macchiavello, C ;

Pellizzari, T ;

Ekert, AK ;

Plenio, MB ;

Cirac, JI .

PHYSICAL REVIEW LETTERS, 1997, 79 (20) :3865-3868

[9] Entanglement in frequency standards and quantum information theory [J].

Huelga, SF ;

Knight, PL ;

Macchiavello, C ;

Plenio, MB ;

Vedral, V .

APPLIED PHYSICS B-LASERS AND OPTICS, 1998, 67 (06) :723-732

[10] QUANTUM PROJECTION NOISE - POPULATION FLUCTUATIONS IN 2-LEVEL SYSTEMS [J].

ITANO, WM ;

BERGQUIST, JC ;

BOLLINGER, JJ ;

GILLIGAN, JM ;

HEINZEN, DJ ;

MOORE, FL ;

RAIZEN, MG ;

WINELAND, DJ .

PHYSICAL REVIEW A, 1993, 47 (05) :3554-3570