Progress in integrated photonics enables combining several elementary functions on single substrates for realizing advanced functionnalized chips. We report a monolithic integrated quantum photonic realization on lithium niobate, where nonlinear optics and electro-optics properties have been harnessed simultaneously for generating heralded configurable, two-photon states. Taking advantage of a picosecond pump laser and telecom components, we demonstrate the production of various path-coded heralded two-photon states, showing 94\% raw visibility for Hong-Ou-Mandel interference. The versatility and performance of such a highly integrated photonic entanglement source enable exploring more complex quantum information processing protocols finding application in communication, metrology and processing tasks.
@article{arxiv.2008.02172,
title = {Configurable heralded two-photon Fock-states on a chip},
author = {Xin Hua and Tommaso Lunghi and Florent Doutre and Panagiotis Vergyris and Grégory Sauder and Pierrick Charlier and Laurent Labonté and Virginia D'Auria and Anthony Martin and Sorin Tascu and Marc P. De Micheli and Sébastien Tanzilli and Olivier Alibart},
journal= {arXiv preprint arXiv:2008.02172},
year = {2025}
}