Bright multiplexed source of indistinguishable single photons with tunable GHz-bandwidth at room temperature

• URL: http://arxiv.org/abs/2104.09337v1
• Date: Mon, 19 Apr 2021 14:23:33 GMT
• Title: Bright multiplexed source of indistinguishable single photons with tunable GHz-bandwidth at room temperature
• Authors: Omri Davidson, Ran Finkelstein, Eilon Poem, and Ofer Firstenberg
• Abstract summary: We realize a spatially-multiplexed heralded source of single photons that are inherently compatible with the commonly employed D2 line of rubidium. Our source is based on four-wave mixing in hot rubidium vapor, requiring no laser cooling or optical cavities, and generates single photons with high rate and low noise.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Narrowband single photons that couple well to atomic ensembles could prove essential for future quantum networks, but the efficient generation of such photons remains an outstanding challenge. We realize a spatially-multiplexed heralded source of single photons that are inherently compatible with the commonly employed D2 line of rubidium. Our source is based on four-wave mixing in hot rubidium vapor, requiring no laser cooling or optical cavities, and generates single photons with high rate and low noise. We use Hong-Ou-Mandel interference to verify the indistinguishability of the photons generated in two different (multiplexed) channels. We further demonstrate a five-fold tunability of the photons' temporal width. The experimental results are well reproduced by a theoretical model.

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