Polarization-entangled photon generation using partial spatially coherent pump beam

被引：14
|
作者：
Ismail, Yaseera [1 ]
Joshi, Stuti [1 ]
Petruccione, Francesco [1 ,2 ]
机构：
[1] Univ KwaZulu Natal, Sch Chem & Phys, Quantum Res Grp, ZA-4000 Durban, South Africa
[2] Natl Inst Theoret Phys NITheP, Kwa Zulu, South Africa
来源：
SCIENTIFIC REPORTS | 2017年 / 7卷
基金：
新加坡国家研究基金会;
关键词：
BELL-INEQUALITY; DOWN-CONVERSION; INTERFERENCE; SPECTRUM; ENERGY; LIGHT;
D O I：
10.1038/s41598-017-12376-6
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：
The generation of two photon fields, to date, has been demonstrated utilizing a fully coherent pump beam. In this paper we demonstrate, the theoretical and experimental generation of polarization entangled single photon pairs by varying the spatial coherence of the pump beam. The effect of the pump beam spatial coherence on the visibility of a polarization-entangled single photon source is investigated. A comparison of the visibility measurements using a fully coherent and partially coherent pump beam is performed. It is shown that the partial coherence of the pump beam contributes to an increase in the visibility. The coherence properties of the beam are significant for free-space optical transmission in particular for long range free-space quantum communication.
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页数：7
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