Properties of entangled photon pairs generated by a CW laser with small coherence time: theory and experiment

被引：18
|
作者：
Cialdi, Simone [1 ]
Castelli, Fabrizio [1 ,2 ]
Paris, Matteo G. A. [2 ,3 ,4 ]
机构：
[1] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy
[2] Univ Milan, Dipartimento Fis, Milan, Italy
[3] Udr Milano Univ, CNISM, Milan, Italy
[4] ISI Fdn, Turin, Italy
来源：
JOURNAL OF MODERN OPTICS | 2009年 / 56卷 / 2-3期
关键词：
down-conversion; entanglement; coherence time; quantum tomography; DOWN-CONVERSION;
D O I：
10.1080/09500340802187332
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The generation of entangled photon pairs by parametric down-conversion from solid state CW lasers with small coherence time is theoretically and experimentally analyzed. We consider a compact and low-cost setup based on a two-crystal scheme with Type-I phase matching. We study the effect of the pump coherence time over the entangled state visibility and over the violation of Bell's inequality, as a function of the crystal length. The full density matrix is reconstructed by quantum tomography. The proposed theoretical model is verified using a purification protocol based on a compensation crystal.
引用
收藏
页码：215 / 225
页数：11
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