Spontaneous symmetry breaking as a resource for noncritically squeezed light

[EN] In the last years we have proposed the use of the mechanism of spontaneous symmetry breaking with the purpose of generating perfect quadrature squeezing. Here we review previous work dealing with spatial (translational and rotational) symmetries, both on optical parametric oscillators and four-wave mixing cavities, as well as present new results. We then extend the phenomenon to the polarization state of the signal field, hence introducing spontaneous polarization symmetry breaking. Finally we propose a Jaynes-Cummings model in which the phenomenon can be investigated at the singlephoton-pair level in a non-dissipative case, with the purpose of understanding it from a most fundamental point of view.This work has been supported by the Spanish Ministerio de Educacion y Ciencia and the European Union FEDER through Project FIS2008-06024-C03-01. C.N.-B. acknowledges a grant from the FPU Programme of the Spanish Government.De Valcarcel Gonzalvo, GJ.; Garcia-Ferrer, FV.; Hoppner, RM.; Pérez Arjona, I.; Navarrete-Benlloch, C.; Roldan, E. (2010). Spontaneous symmetry breaking as a resource for noncritically squeezed light. Proceedings of SPIE/ Quantum Optics. 7727(772704). doi:10.1117/12.854316S772777270