Einstein-Podolsky-Rosen Energy-Time Entanglement of Narrowband Biphotons
arXiv:1911.00723 · doi:10.1103/PhysRevLett.124.010509
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.
arXiv comment5 pages, 3 figures
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- Postselection-Free Cavity-Enhanced Narrow-Band Orbital Angular Momentum Entangled Photon Source
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- Photonic quantum information with time-bins: Principles and applications