2014/05/06 by Patrick Michelberger, P. S. Michelberger, T. F. M. Champion +15
Computer Science · Physics and Astronomy · #Bandwidth (computing) #Computer hardware #Computer science #Electronic engineering #Interfacing #Multiplexing #Neural Networks and Reservoir Computing #Optics #Optoelectronics #Photon #Photonics #Physics #Quantum Information and Cryptography #Quantum optics and atomic interactions #Scalability #Single-photon source #Telecommunications #quant-ph
paper · pdf · doi:10.1088/1367-2630/17/4/043006
arxiv created 2014/05/06 · openalex publication_date 2015/04/02 · arxiv updated 2015/06/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
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.