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arXiv · 1911.00723

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

Yefeng Mei·Yiru Zhou·Shanchao Zhang·Jianfeng Li·Kaiyu Liao·Hui Yan·Shi-Liang Zhu·Shengwang Du
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Abstract

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.

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Yefeng Mei, Yiru Zhou, Shanchao Zhang, Jianfeng Li, Kaiyu Liao, Hui Yan, Shi-Liang Zhu, Shengwang Du. 2019-11-02. Einstein-Podolsky-Rosen Energy-Time Entanglement of Narrowband Biphotons. https://doi.org/10.1103/physrevlett.124.010509

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