Precisely resolving two-photon energy-time entanglement by dual-channel Fabry-Pérot interferometry
Yuan Sun · Physical Review A · 2015
Methods for precisely resolving the continuous-variable energy-time entanglement of paired photons have always been sought in quantum optics. The Fabry-P\'erot interferometer provides such a distinguished opportunity if the single-photon pulse's self-interference is carefully avoided. A dual-channel Fabry-P\'erot interferometer is proposed and studied with the focus put upon higher-order quantum interference effects. When the two channels are properly set up, the interferometer is capable of resolving the energy-time entanglement in detail, similar to how the usual Fabry-P\'erot interferometer can resolve classical light's spectrum. A variation form of the dual-channel Fabry-P\'erot interferometry is also discussed.