The continuous-variable (CV) Einstein-Podolsky-Rosen (EPR) paradox and steering are demonstrated using a pulsed light source and waveguides. We shorten the duration of the local oscillator (LO) pulse by using parametric amplification to improve the temporal mode-matching between the entangled pulse and the LO pulse. After correcting for the amplifier noise, the product of the measured conditional variance of the quadrature-phase amplitudes is 0.74 < 1, which satisfies the EPR-Reid criterion.
Ami Shinjo, Naoyuki Hashiyama, Akane Koshio, Yujiro Eto, and Takuya Hirano, "Observation of strong continuous-variable Einstein-Podolsky-Rosen entanglement using shaped local oscillators," Proc. SPIE 9996, Quantum Information Science and Technology II, 99960I (Presented at SPIE Security + Defence: September 27, 2016; Published: 24 October 2016); https://doi.org/10.1117/12.2241297.
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