Precisely resolve energy-time entanglement by dual channel Fabry-Perot interferometry

TL;DR

This paper introduces a dual channel Fabry-Perot interferometer designed to precisely resolve energy-time entanglement of photon pairs, advancing quantum optics measurement techniques by leveraging higher order quantum interference effects.

Contribution

It proposes and analyzes a novel dual channel Fabry-Perot interferometer capable of detailed energy-time entanglement resolution, avoiding single photon self-interference.

Findings

Capable of resolving energy-time entanglement in detail

Effectively avoids single photon self-interference

Provides a method analogous to classical spectrum resolution

Abstract

Precisely resolving the continuous variable energy-time entanglement of paired photons is an important issue in quantum optics. The Fabry-Perot interferometer provides a distinguished opportunity for this purpose if the single photon pulse's self-interference is carefully avoided. A dual channel Fabry-Perot interferometer is proposed and studied with the focus put upon higher order quantum interference effects. When the two channels are properly set up, it is capable of resolving the energy-time entanglement in detail analogously to that a usual Fabry-Perot interferometer can resolve classical light's spectrum. Variation form of the dual channel Fabry-Perot interferometry is also discussed.