Atomic quantum memory for multimode frequency combs

Abstract

We propose a Raman quantum memory scheme that uses several atomic ensembles to store and retrieve the multimode highly entangled state of an optical quantum frequency comb, such as the one produced by parametric down-conversion of a pump frequency comb. We analyse the efficiency and the fidelity of such a quantum memory. Results show that our proposal may be helpful to multimode information processing using the different frequency bands of an optical frequency comb.

6 pages, 3 figures

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• Spectral Shaping of Cascade Emissions from Multiplexed Cold Atomic Ensembles
• Atomic-frequency-comb quantum memory via piecewise adiabatic passage
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• Spectral compression and entanglement reduction in the cascaded biphoton state with cavities
• Almost indistinguishable single photons via multiplexing cascaded biphotons with cavity modulation and phase compensation
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