A high-brightness source of narrowband, identical-photon pairs

被引：175

作者：

Thompson, James K.

Simon, Jonathan

Loh, Huanqian

Vuletic, Vladan

机构：

[1] MIT, Dept Phys, MIT Harvard Ctr Ultracold Atoms, Elect Res Lab, Cambridge, MA 02139 USA

[2] Harvard Univ, MIT Harvard Ctr Ultracold Atoms, Dept Phys, Cambridge, MA 02138 USA

来源：

SCIENCE | 2006年 / 313卷 / 5783期

关键词：

D O I：

10.1126/science.1127676

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We generated narrowband pairs of nearly identical photons at a rate of 5 X 10(4) pairs per second from a laser-cooled atomic ensemble inside an optical cavity. A two-photon interference experiment demonstrated that the photons could be made 90% indistinguishable, a key requirement for quantum information-processing protocols. Used as a conditional single-photon source, the system operated near the fundamental limits on recovery efficiency (57%), Fourier transform - limited bandwidth, and pair-generation-rate - limited suppression of two-photon events ( factor of 33 below the Poisson limit). Each photon had a spectral width of 1.1 megahertz, ideal for interacting with atomic ensembles that form the basis of proposed quantum memories and logic.

引用

页码：74 / 77

页数：4

共 29 条

[1] Coherent atom interactions mediated by dark-state polaritons -: art. no. 243602 [J].