Interfacing GHz-bandwidth heralded single photons with a warm vapour Raman memory

Broadband quantum memories, used as temporal multiplexers, are a key component in photonic quantum information processing, as they make repeat-until-success strategies scalable. We demonstrate a prototype system, operating on-demand, by interfacing a warm vapour, high time-bandwidth-product Raman me...

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Bibliographic Details
Published inNew journal of physics Vol. 17; no. 4; pp. 43006 - 43015
Main Authors Michelberger, P S, Champion, T F M, Sprague, M R, Kaczmarek, K T, Barbieri, M, Jin, X M, England, D G, Kolthammer, W S, Saunders, D J, Nunn, J, Walmsley, I A
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 02.04.2015
Subjects
Broadband
Data processing
Four-wave mixing
Multiplexers
Noise
Photonics
Photons
Physics
quantum communication
quantum computer
quantum memory
Quantum phenomena
Raman interaction
room-temperature
single photon storage
temporal multiplexer
Traveling waves
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Summary:Broadband quantum memories, used as temporal multiplexers, are a key component in photonic quantum information processing, as they make repeat-until-success strategies scalable. We demonstrate a prototype system, operating on-demand, by interfacing a warm vapour, high time-bandwidth-product Raman memory with a travelling wave spontaneous parametric down-conversion source. We store single photons and observe a clear influence of the input photon statistics on the retrieved light, which we find currently to be limited by noise. We develop a theoretical model that identifies four-wave mixing as the sole important noise source and point towards practical solutions for noise-free operation.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/17/4/043006