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

Tue, 2015-06-02 01:44 - Josh Nunn
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Date: 
2015-04-02
Author(s): 

P S Michelberger1, T F M Champion1, M R Sprague1, K T Kaczmarek1, M Barbieri1, X M Jin1,2, D G England1,3, W S Kolthammer1, D J Saunders1, J Nunn1 and I A Walmsley

Reference: 

IOPEXPORT_BIB.bib

IOPEXPORT_BIB.bib

1367-2630-17-4-043006
Interfacing GHz-bandwidth heralded single photons with a warm vapour Raman memory
P. S. Michelberger and T. F. M. Champion and M. R. Sprague and K. T. Kaczmarek and M. Barbieri and X. M. Jin and D. G. England and W. S. Kolthammer and D. J. Saunders and J. Nunn and I. A. Walmsley
New Journal of Physics 
17 
043006 
(2015)
http://stacks.iop.org/1367-2630/17/i=4/a=043006
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.
URL: 

http://iopscience.iop.org/1367-2630/17/4/043006

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.