Photons' frequency degree of freedom is promising to realize large-scale quantum information processing. Quantum frequency combs (QFCs) generated in integrated nonlinear microresonators can produce multiple frequency modes with narrow linewidth. Here, we utilize polarization-entangled QFCs to generate discrete frequency-bin entangled states. Fourteen pairs of polarization-entangled photons with different frequencies are simultaneously transformed into frequency-bin entangled states. The characteristic of frequency-bin entanglement is demonstrated by Hong-Ou-Mandel interference, which can be performed with single or multiple frequency pairs in parallel. Our work paves the way for harnessing large-scale frequency-bin entanglement and converting between different degrees of freedom in quantum information processing.
@article{arxiv.2411.18304,
title = {Discrete and parallel frequency-bin entanglement generation from quantum frequency comb},
author = {Chi Lu and Xiaoyu Wu and Wenjun Wen and Xiao-song Ma},
journal= {arXiv preprint arXiv:2411.18304},
year = {2024}
}