Synchronization and Phase Shaping of Single Photons with High-Efficiency Quantum Memory

Time synchronization and phase shaping of single photons both play fundamental roles in quantum information applications that rely on multi-photon interference. Phase typically requires separate modulators with extra insertion losses. Here, we develop a all-optical built-in modulator for using memory. The fast modulation photon step linear manner are verified by observing the efficient quantum-memory-assisted Hong-Ou-Mandel interference between two photons, where anti-coalescence effect bosonic pairs is demonstrated. developed may push forward practical applications.