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

Abstract

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

Controllable single-photon transport mediated by a time-modulated Jaynes–Cummings model

“…processing [4][5][6][7]. Many schemes for controlling photon scattering in a one-dimensional waveguide coupled to different quantum emitters, such as atomic systems [8][9][10][11][12][13][14][15] and atom-cavity system [16][17][18][19][20][21][22], are proposed and have been demonstrated experimentally [23][24][25][26][27][28][29][30][31].…”

Efficient multiplexed quantum memory with high dimensional orbital angular momentum states in cold atoms

“…To overcome this challenge, the concept of quantum repeaters has been proposed 4 . Quantum memories 5 , which enable the storage and retrieval of quantum states with fidelity surpassing any classical device, are beneficial for synchronizing probabilistic single photons and effectively increasing the entanglement swapping rate within quantum repeater nodes [6][7][8][9][10][11][12] . The critical factors in this context are storage efficiency and multi-mode capacity, as they directly determine the entanglement distribution efficiency.…”

Dynamic modulated single-photon routing

“…Quantum networks, [1] which composed of various nodes and channels for storing, processing and distributing quantum information, have been widely applied to quantum computing, quantum simulation, quantum communication, and fundamental tests of physics in large scale space. [2][3][4][5][6] As one kind of typical node devices, quantum routers are essential elements in quantum networks, which can be exploited to transfer information from its source to different quantum channels. In this regard, a variety of theoretical and experimental efforts have been devoted to the realization and development of single-photon router based on atomic systems, [7][8][9] whispering-gallery resonators, [10][11][12][13] optomechanical systems, [14][15][16][17] cavity (circuit) quantum electrodynamics (QED), [18][19][20][21][22] and waveguide-QED systems.…”