Violation of Bell's inequality with photons from independent sources
T. B. Pittman, J. D. Franson · Frontiers in Optics · 2003
We report a violation of Bell’s inequality using one photon from a pulsed parametric down-conversion pair and a second photon from a weak coherent state. The experiment relied on post-selected three-photon interference effects that also have direct applications in linear optics quantum computing.