Subnatural-linewidth biphotons from a Doppler-broadened hot atomic vapour cell

Chi Shu, Peng Chen, Tsz Kiu Aaron Chow, Lingbang Zhu, Yanhong Xiao, M.M.T. Loy and Shengwang Du ()
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Chi Shu: The Hong Kong University of Science and Technology, Clear Water Bay
Peng Chen: The Hong Kong University of Science and Technology, Clear Water Bay
Tsz Kiu Aaron Chow: The Hong Kong University of Science and Technology, Clear Water Bay
Lingbang Zhu: The Hong Kong University of Science and Technology, Clear Water Bay
Yanhong Xiao: State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures, Fudan University
M.M.T. Loy: The Hong Kong University of Science and Technology, Clear Water Bay
Shengwang Du: The Hong Kong University of Science and Technology, Clear Water Bay

Nature Communications, 2016, vol. 7, issue 1, 1-5

Abstract: Abstract Entangled photon pairs, termed as biphotons, have been the benchmark tool for experimental quantum optics. The quantum-network protocols based on photon–atom interfaces have stimulated a great demand for single photons with bandwidth comparable to or narrower than the atomic natural linewidth. In the past decade, laser-cooled atoms have often been used for producing such biphotons, but the apparatus is too large and complicated for engineering. Here we report the generation of subnatural-linewidth (

Date: 2016
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DOI: 10.1038/ncomms12783

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