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.
@article{arxiv.1003.2581,
title = {Noncritical quadrature squeezing through spontaneous polarization symmetry breaking},
author = {Ferran V. Garcia-Ferrer and Carlos Navarrete-Benlloch and Germán J. de Valcárcel and Eugenio Roldán},
journal= {arXiv preprint arXiv:1003.2581},
year = {2011}
}