Measurement of Entanglement in Time Domain—an Experiment towards Demonstration of EPR paradox with Continuous Variable using Laser Pulses
Yun Zhang, R. Okubo, Mayumi Hirano, Takuya Hirano, Alexander I. Lvovsky · AIP conference proceedings · 2009
We report on a measurement of entanglement in the time domain. The entanglement is examined by the Duan‐Simon criteria. We obtained Duan‐Simon criteria of Δ2(x1−x2)+Δ2(p1+p2) = 1.4<2 without optimal gain and Δ2(x1−x2)+Δ2(p1+p2) = 1.2<2 with optimal gain, respectively. This opens the way to realize both efficient and truly causal EPR paradox.