Noncritical quadrature squeezing through spontaneous polarization symmetry breaking

TL;DR

This paper proposes a method to generate noncritical quadrature squeezing via spontaneous polarization symmetry breaking in a four-wave mixing cavity, achieving complete noise suppression regardless of parameter settings.

Contribution

It introduces a novel cavity design using four-wave mixing that enables quadrature squeezing without critical tuning, unlike previous methods.

Findings

Complete noise suppression in a quadrature of the output field

Polarization of output mode remains linearly polarized with arbitrary orientation

Squeezing occurs regardless of parameter values

Abstract

We discuss the possibility of generating noncritical quadrature squeezing by spontaneous polarization symmetry breaking. We consider first type-II frequency-degenerate optical parametric oscillators, but discard them for a number of reasons. Then we propose a four-wave mixing cavity in which the polarization of the output mode is always linear but has an arbitrary orientation. We show that in such a cavity complete noise suppression in a quadrature of the output field occurs, irrespective of the parameter values.