Complete and deterministic discrimination of polarization Bell states assisted by momentum entanglement

被引：170

作者：

Barbieri, M.

Vallone, G.

Mataloni, P.

De Martini, F.

机构：

[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[2] Consorzio Nazl Interuniv Sci Fis Materia, I-00185 Rome, Italy

[3] Univ Turin, Dipartimento Fis Teor, I-10100 Turin, Italy

[4] Ist Nazl Fis Nucl, Sez Torino, I-10100 Turin, Italy

来源：

PHYSICAL REVIEW A | 2007年 / 75卷 / 04期

关键词：

PODOLSKY-ROSEN CHANNELS; QUANTUM CRYPTOGRAPHY; COMMUNICATION; INEQUALITY; TIME;

D O I：

10.1103/PhysRevA.75.042317

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A complete and deterministic Bell state measurement was realized by a simple linear optics experimental scheme which adopts two-photon polarization-momentum hyperentanglement. The scheme, which is based on the discrimination among the single photon Bell states of the hyperentangled state, requires the adoption of standard single photon detectors. The four polarization Bell states have been measured with average fidelity F=0.889 +/- 0.010 by using the linear momentum degree of freedom as the ancilla. The feasibility of the scheme has been characterized as a function of the purity of momentum entanglement.

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页数：4

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