Postselection-free energy-time entanglement

被引：81

作者：

Strekalov, DV ^{[1
]}

Pittman, TB ^{[1
]}

Sergienko, AV ^{[1
]}

Shih, YH ^{[1
]}

Kwiat, PG ^{[1
]}

机构：

[1] LOS ALAMOS NATL LAB, DIV PHYS, LOS ALAMOS, NM 87545 USA

来源：

PHYSICAL REVIEW A | 1996年 / 54卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.54.R1

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a two-photon interference experiment that realizes a postselection-free test of Bell's inequality based on energy-time entanglement. In contrast with all previous experiments of this type, the employed entangled states are obtained without the use of a beam splitter or a short coincidence window to ''throw away'' unwanted amplitudes. A (95.0+/-1.4)% interference fringe visibility is observed, implying a strong violation of the Bell inequality. The scheme is very compact and has demonstrated excellent stability, suggesting that it may be useful, for example, in practical quantum cryptography.

引用

页码：R1 / R4

页数：4

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