Quantum Memory in Brillouin-Active Waveguides

Storage and retrieval of optical quantum states are key elements for the realization of quantum communication and quantum networks. Here, we propose to realize a memory for light states in Brillouin-active waveguides. It is achieved by transferring quantum states between optical photons and acoustic phonons via Brillouin anti-Stokes scattering. By controlling the optoacoustic interaction with pulsed pumps, we demonstrate that it is possible to write, store, and read out of optical quantum states with high fidelity in state-of-the-art Brillouin-active waveguides.