双光子干涉偏振纠缠光子在弗朗森干涉仪。

Two-photon interference of polarization-entangled photons in a Franson interferometer.

机构信息

Department of Physics, Pusan National University, Geumjeong-Gu, Busan, 46241, South Korea.

Korea Research Institute of Standards and Science, Daejeon, 34113, South Korea.

出版信息

Sci Rep. 2017 Jul 18;7(1):5772. doi: 10.1038/s41598-017-06196-x.

DOI:10.1038/s41598-017-06196-x

PMID:28720885

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5516045/

Abstract

We present two-photon interference experiments with polarization-entangled photon pairs in a polarization-based Franson-type interferometer. Although the two photons do not meet at a common beamsplitter, a phase-insensitive Hong-Ou-Mandel type two-photon interference peak and dip fringes are observed, resulting from the two-photon interference effect between two indistinguishable two-photon probability amplitudes leading to a coincidence detection. A spatial quantum beating fringe is also measured for nondegenerate photon pairs in the same interferometer, although the two-photon states have no frequency entanglement. When unentangled polarization-correlated photons are used as an input state, the polarization entanglement is successfully recovered through the interferometer via delayed compensation.

摘要

我们在基于偏振的 Franson 型干涉仪中展示了偏振纠缠光子对的双光子干涉实验。尽管两个光子没有在公共分束器相遇，但由于两个不可分辨的双光子概率幅之间的双光子干涉效应导致符合检测，观察到了相位不敏感的 Hong-Ou-Mandel 型双光子干涉峰和谷条纹。即使双光子态没有频率纠缠，在相同的干涉仪中也测量到了非简并光子对的空间量子拍频条纹。当使用未纠缠的偏振相关光子作为输入态时，通过干涉仪通过延迟补偿成功恢复了偏振纠缠。