Hong-Ou-Mandel Interference between Photons Encoded with Orthogonal Spectra

Sun Hyun YOUN*

Xiang Cheng, Yujie Chen, Kai-Chi Chang +1 more

We demonstrated discrete frequency-bin entanglement generation via a Hong-Ou-Mandel type interference of orthogonally polarized biphotons. By tuning the temporal distinguishability in the HOM-type interference, we generated high-dimensional frequency-bin entanglement characterized via temporal quantum beating.

Agata M. Brańczyk

This article is a detailed introduction to Hong-Ou-Mandel (HOM) interference, in which two photons interfere on a beamsplitter in a way that depends on the photons' distinguishability. We begin by considering distinguishability in the polarization degree of freedom. We then consider spectral distinguishability, and show explicitly how to calculate the HOM dip for three interesting cases: 1) photons with arbitrary spectral distributions, 2) spectrally entangled photons, and 3) spectrally mixed photons.

Paul G. Kwiat

Qiuying Li, Minggui Liang, Jiawei Liu +6 more

Felix Mann, Helen M. Chrzanowski, Felipe Lucas Gewers +2 more

Hong-Ou-Mandel interference is a quantum phenomenon that underlies quantum information processing with single photons. Using a quantum frequency converter as an active beam splitter we demonstrate Hong-Ou-Mandel interference of two photons of vastly different colors.