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

by Sprague, M R , Saunders, D J , Walmsley, I A , Barbieri, M , Nunn, J , Kaczmarek, K T , Jin, X M , Kolthammer, W S , Michelberger, P S , Champion, T F M , England, D G

in Bandwidth / Broadband / Data processing / Four wave mixing / Multiplexers / Multiplexing / Multiplexing equipment / Noise / Optical frequency conversion / Particle beams / Photonics / Photons / Physics / Quantum communication / quantum computer / Quantum computers / Quantum memory / Quantum optics / Quantum phenomena / Raman interaction / Raman interactions / Room temperature / Single photon storage / temporal multiplexer / Traveling waves

2015

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

by Sprague, M R , Saunders, D J , Walmsley, I A , Barbieri, M , Nunn, J , Kaczmarek, K T , Jin, X M , Kolthammer, W S , Michelberger, P S , Champion, T F M , England, D G

2015

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

by Sprague, M R , Saunders, D J , Walmsley, I A , Barbieri, M , Nunn, J , Kaczmarek, K T , Jin, X M , Kolthammer, W S , Michelberger, P S , Champion, T F M , England, D G

2015

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Journal Article

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

Sprague, M R,

Saunders, D J,

Walmsley, I A,

Barbieri, M,

Nunn, J,

Kaczmarek, K T,

Jin, X M,

Kolthammer, W S,

Michelberger, P S,

Champion, T F M,

England, D G

2015

Overview

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.

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Publisher

IOP Publishing

Subject

/ Multiplexing equipment