关于两个独立光源的Hong-Ou-Mandel干涉研究。

Research on the Hong-Ou-Mandel interference with two independent sources.

作者信息

Wang Si, Liu Chen-Xi, Li Jian, Wang Qin

机构信息

Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China.

Broadband Wireless Communication and Senser Network Technology, Key Lab of Ministry of Education, NUPT, Nanjing, 210003, China.

出版信息

Sci Rep. 2019 Mar 7;9(1):3854. doi: 10.1038/s41598-019-40720-5.

DOI:10.1038/s41598-019-40720-5

PMID:30846844

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6405866/

Abstract

In this paper, we carry out investigation on the HOM interference between two independent photons by using interference filters with different bandwidth both in theory and experiment. Our experimental results are consistent with the theoretical predictions. From the experimental and theoretical results, we find that interference filters with a narrower bandwidth can help to give a larger coherence length, due to the broadening of photon wave-packet in the spatial domain, resulting in an higher interference visibility. Furthermore, a combination of interference filters with different bandwidths may help to achieve a nice balance between coincidence counting rate and interference visibility. Our present work might provide valuable reference for further implementation of HOM interference in the field of quantum information.

摘要

在本文中，我们通过使用具有不同带宽的干涉滤光片，在理论和实验上对两个独立光子之间的Hong-Ou-Mandel（HOM）干涉进行了研究。我们的实验结果与理论预测一致。从实验和理论结果中，我们发现带宽较窄的干涉滤光片由于光子波包在空间域的展宽，有助于产生更大的相干长度，从而导致更高的干涉可见度。此外，不同带宽干涉滤光片的组合可能有助于在符合计数率和干涉可见度之间实现良好的平衡。我们目前的工作可能为量子信息领域中HOM干涉的进一步实现提供有价值的参考。