A Deterministic and Storable Single-Photon Source Based on Quantum Memory

Abstract

A single photon source is realized with a cold atomic ensemble (${}^{87}$Rb atoms). In the experiment, single photons, which is initially stored in an atomic quantum memory generated by Raman scattering of a laser pulse, can be emitted deterministically at a time-delay in control. It is shown that production rate of single photons can be enhanced by a feedback circuit considerably while the single-photon quality is conserved. Thus our present single-photon source is well suitable for future large-scale realization of quantum communication and linear optical quantum computation.

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• Deterministic single photons via conditional quantum evolution

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