Cougate-Franson interferometry for testing nonlocality of time-energy entangled biphotons
Changchen Chen, Jeffrey H. Shapiro, Franco N. C. Wong · Conference on Lasers and Electro-Optics · 2021
We report the first experimental demonstration of a conjugate-Franson interferometer, i.e., a nonlocal interferometer that can certify time-energy entanglement. Our measured 96% visibility tightly bounds the temporal correlation of biphotons generated by spontaneous parametric down-conversion.