Franson Interference Generated by a Two-Level System.

Physical review letters

PubMedID: 28157345

Peiris M, Konthasinghe K, Muller A. Franson Interference Generated by a Two-Level System. Phys Rev Lett. 2017;118(3):030501.
We report a Franson interferometry experiment based on correlated photon pairs generated via frequency-filtered scattered light from a near-resonantly driven two-level semiconductor quantum dot. In contrast to spontaneous parametric down-conversion and four-wave mixing, this approach can produce single pairs of correlated photons. We have measured a Franson visibility as high as 66%, which goes beyond the classical limit of 50% and approaches the limit of violation of Bell's inequalities (70. 7%).