Measuring two-photon orbital angular momentum entanglement

被引：24

作者：

Calvo, G. F. ^{[1
]}

Picon, A. ^{[1
]}

Bramon, A. ^{[1
]}

机构：

[1] Univ Autonoma Barcelona, Grp Fis Teor, Bellaterra 08193, Barcelona, Spain

来源：

PHYSICAL REVIEW A | 2007年 / 75卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.75.012319

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We put forward an approach to estimate the amount of bipartite spatial entanglement of down-converted photon states correlated in orbital angular momentum and the magnitude of the transverse (radial) wave vectors. Both degrees of freedom are properly considered in our framework, which only requires azimuthal local linear optical transformations and mode selection analysis with two fiber detectors. The coincidence distributions predicted by our approach give an excellent fit to the distributions measured in a recent experiment aimed to show the very high-dimensional transverse entanglement of twin photons from a down-conversion source. Our estimate for the Schmidt number is substantially lower but still confirms the presence of high-dimensional entanglement.

引用

页数：8

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