Conditional-phase switch at the single-photon level

被引：72

作者：

Resch, KJ ^{[1
]}

Lundeen, JS ^{[1
]}

Steinberg, AM ^{[1
]}

机构：

[1] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.89.037904

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an experimental realization of a two-photon conditional phase switch, related to the "c-phi " gate of quantum computation. This gate relies on quantum interference between photon pairs and generates entanglement between two optical modes through the process of spontaneous parametric down-conversion (SPDC). The interference effect serves to enhance the effective nonlinearity by many orders of magnitude, so it is significant at the quantum (single-photon) level. By adjusting the relative optical phase between the classical pump for SPDC and the pair of input modes, one can impress a large phase shift on one beam which depends on the presence or absence of a single photon in a control mode.

引用

页数：4

共 32 条

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