Beyond photon pairs: Nonlinear quantum photonics in the high-gain regime

TL;DR

This paper develops a unified theoretical framework for high-gain nonlinear quantum photonics in integrated optical devices, enabling comparison of stimulated and spontaneous experiments and calculation of generated quantum states.

Contribution

It introduces a comprehensive formulation based on Maxwell's equations for analyzing high-gain quantum light generation in integrated photonic structures.

Findings

Unified approach for stimulated and spontaneous experiments

Framework for calculating quantum states in high-gain regimes

Comparison across different integrated photonic platforms

Abstract

Integrated optical devices will play a central role in the future development of nonlinear quantum photonics. Here we focus on the generation of high-gain nonclassical light within them. Starting from the solid foundation provided by Maxwell's equations, we then move to applications by presenting a unified formulation that allows for a comparison of stimulated and spontaneous experiments in ring resonators and nanophotonic waveguides, and leads directly to the calculation of the quantum states of light generated in high-gain experiments.