Homodyne tomography characterization and nonlocality of a dual-mode optical qubit

被引：93

作者：

Babichev, SA ^{[1
]}

Appel, J ^{[1
]}

Lvovsky, AI ^{[1
]}

机构：

[1] Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.92.193601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A single photon, delocalized over two optical modes, is characterized by means of quantum homodyne tomography. The reconstructed four-dimensional density matrix extends over the entire Hilbert space and thus reveals, for the first time, complete information about the dual-rail optical quantum bit as a state of the electromagnetic field. The experimental data violate the Bell inequality albeit with a loophole similar to the detection loophole in photon counting experiments.

引用

页码：193601 / 1

页数：4

共 35 条

[1] Optical mode characterization of single photons prepared by means of conditional measurements on a biphoton state [J].

Aichele, T ;

Lvovsky, AI ;

Schiller, S .

EUROPEAN PHYSICAL JOURNAL D, 2002, 18 (02) :237-245

[2] Ancilla-assisted quantum process tomography [J].

Altepeter, JB ;

Branning, D ;

Jeffrey, E ;

Wei, TC ;

Kwiat, PG ;

Thew, RT ;

O'Brien, JL ;

Nielsen, MA ;

White, AG .

PHYSICAL REVIEW LETTERS, 2003, 90 (19) :4

[3] EXPERIMENTAL TEST OF BELL INEQUALITIES USING TIME-VARYING ANALYZERS [J].

ASPECT, A ;

DALIBARD, J ;

ROGER, G .

PHYSICAL REVIEW LETTERS, 1982, 49 (25) :1804-1807

[4] Maximum-likelihood estimation of the density matrix [J].

Banaszek, K ;

D'Ariano, GM ;

Paris, MGA ;

Sacchi, MF .

PHYSICAL REVIEW A, 2000, 61 (01) :4

[5] Testing quantum nonlocality in phase space [J].

Banaszek, K ;

Wódkiewicz, K .

PHYSICAL REVIEW LETTERS, 1999, 82 (10) :2009-2013

[6]

Bell J., 1987, Speakable and Unspeakable in Quantum Theory

[7]

Bell JS., 1964, PHYS PHYS FIZIKA, V1, P195, DOI [10.1103/Physics-PhysiqueFizika.1.195, 10.1103/PhysicsPhysiqueFizika.1.195, DOI 10.1103/PHYSICSPHYSIQUEFIZIKA.1.195]

[8] Measurement of the quantum states of squeezed light [J].

Breitenbach, G ;

Schiller, S ;

Mlynek, J .

NATURE, 1997, 387 (6632) :471-475

[9] Maximal violation of Bell's inequalities for continuous variable systems [J].

Chen, ZB ;

Pan, JW ;

Hou, G ;

Zhang, YD .

PHYSICAL REVIEW LETTERS, 2002, 88 (04) :4-404064

[10]

FEYNMAN RP, 1963, FEYNMAN LECT PHYS, V1, P37

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