A hybrid quantum interferometer bridging Hong-Ou-Mandel and N00N-state interference

Authors:Zi-Qi Zeng, Samuel Corona-Aquino, Tao Xie, Bin Yin, Yan Guo, Yukun Song, Yun Meng, Kai Zou, Song Li, Xiaolong Hu, Alfred B. U'Ren, Roberto de J. León-Montiel, Chenglong You, Baihong Li, Dongzhou Wang, Rui-Bo Jin

Abstract:Hong-Ou-Mandel (HOM) interference offers robustness in high-noise environments due to its phase-insensitive nature, while N00N-state interference provides enhanced phase sensitivity for precision measurements in low-noise settings. However, their realizations have typically required separate experimental platforms. Here, we report a single hybrid quantum interferometer that can dynamically transition between HOM and N00N-state interference by adjusting two time delays, $\tau_1$ and $\tau_2$. This tunability enables operation in phase-insensitive, phase-sensitive, or hybrid modes within a unified setup, as confirmed by theoretical analysis and experimental demonstration. Our system offers a versatile platform with potential for quantum sensing applications, paving the way for integrated quantum technologies capable of adapting to diverse noise conditions.

arXiv:2610.20202 [quant-ph]

(or arXiv:2610.20202v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2610.20202 arXiv-issued DOI via DataCite (pending registration)

https://doi.org/10.1103/pd91-dyf9 DOI(s) linking to related resources