Demonstration of a bright and compact source of tripartite nonclassical light

TL;DR

This paper presents an experimental demonstration of a bright, compact source of tripartite nonclassical light using a single nonlinear crystal with simultaneous parametric interactions, showing noise reduction and photon correlations.

Contribution

It introduces a novel, practical source of tripartite nonclassical light based on a single crystal with linked parametric processes, validated by experimental and theoretical analysis.

Findings

Achieved sub-shot-noise tripartite light field

Demonstrated good agreement between experiment and theory

Analyzed effects of pump intensities on photon correlations

Abstract

We experimentally demonstrate the nonclassical photon number correlations expected in tripartite continuous variable states obtained by parametric processes. Our scheme involves a single nonlinear crystal, where two interlinked parametric interactions take place simultaneously, and represents a bright and compact source of a sub-shot-noise tripartite light field. We analyze the effects of the pump intensities on the numbers of detected photons and on the amount of noise reduction in some details, thus demonstrating a good agreement between the experimental data and a single-mode theoretical description.