Two-photon interference with coherently-driven three-level atomic system

Abstract EN

Two-photon interference experiments have historically been associated with two-photon state produced in the process of spontaneous parametric down conversion.

We investigate the entangled twophoton state obtained from a three-level cascade atomic system driven by two coherent optical fields as an input state in a two photon interference experiment with a beam-splitter.

For weak-coupling scheme and particular choices of the atomic parameters, interference effects have been shown with higher visibility than those obtained with the same atomic system with thermal excitation considered before.