6533b823fe1ef96bd127f730
RESEARCH PRODUCT
Noncritically squeezed light via spontaneous rotational symmetry breaking.
Eugenio RoldánCarlos Navarrete-benllochGerma~¡n J. De Valcárcelsubject
PhysicsQuantum PhysicsSpontaneous symmetry breakingDegenerate energy levelsRotational symmetryFOS: Physical sciencesPhysics::OpticsGeneral Physics and AstronomyCurved mirrorExplicit symmetry breakingQuantum mechanicsOptical parametric oscillatorAtomic physicsQuantum Physics (quant-ph)AnisotropySqueezed coherent statedescription
We theoretically address squeezed light generation through the spontaneous breaking of the rotational invariance occuring in a type I degenerate optical parametric oscillator (DOPO) pumped above threshold. We show that a DOPO with spherical mirrors, in which the signal and idler fields correspond to first order Laguerre-Gauss modes, produces a perfectly squeezed vacuum with the shape of a Hermite-Gauss mode, within the linearized theory. This occurs at any pumping level above threshold, hence the phenomenon is non-critical. Imperfections of the rotational symmetry, due e.g. to cavity anisotropy, are shown to have a small impact, hence the result is not singular.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-09-03 | Physical review letters |