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Einstein-Podolsky-Rosen Energy-Time Entanglement of Narrowband Biphotons

We report the direct characterization of energy-time entanglement of narrowband biphotons produced from spontaneous four-wave mixing in cold atoms. The Stokes and anti-Stokes two-photon temporal correlation is measured by single-photon counters with nano second temporal resolution, and their joint spectrum is determined by using a narrow linewidth optical cavity. The energy-time entanglement is verified by the joint frequency-time uncertainty product of 0.063 +/- 0.0044, which does not only violate the separability criterion but also satisfies the continuous variable Einstein-Podolsky-Rosen steering inequality.

preprint2019arXivOpen access
Yefeng MeiYiru ZhouShanchao ZhangJianfeng LiKaiyu LiaoHui YanShi-Liang ZhuShengwang Du
physics.opticsquant-ph
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Open access8 authors2 topics
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Yefeng MeiYiru ZhouShanchao ZhangJianfeng LiKaiyu LiaoHui YanShi-Liang ZhuShengwang Du

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