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Título

Polarization quantum properties in a type-II Optical Parametric Oscillator below threshold

AutorZambrini, Roberta ; Gatti, Alessandra; Lugiato, Luigi A.; San Miguel, Maxi
Palabras clave[PACS] Quantum fluctuations, quantum noise, and quantum jumps
[PACS] Nonclassical states of the electromagnetic field, including entangled photon states; quantum state engineering and measurements
[PACS] Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics
[PACS] Quantum description of interaction of light and matter; related experiments
Fecha de publicación10-dic-2003
EditorAmerican Physical Society
CitaciónPhysical Review A 68(6): 063809 (2003)
ResumenWe study the far field spatial distribution of the quantum fluctuations in the transverse profile of the output light beam generated by a type II Optical Parametric Oscillator below threshold, including the effects of transverse walk-off. We study how quadrature field correlations depend on the polarization. We find spatial EPR entanglement in quadrature-polarization components: For the far field points not affected by walk-off there is almost complete noise suppression in the proper quadratures difference of any orthogonal polarization components. We also investigate nonclassical polarization properties in terms of the Stokes operators. We find no polarization squeezing. We show the entanglement of the state of symmetric intense, or macroscopic, spatial light modes. We find perfect correlations in all Stokes parameters measured in opposite far field points in the direction orthogonal to the walk-off, while locally the field is unpolarized and we find no polarization squeezing.
Descripción14 pages, 18 figures.-- PACS nrs.: 42.50.Lc, 42.50.Dv, 42.65.Sf, 42.50.Ct.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0306134
Versión del editorhttp://dx.doi.org/10.1103/PhysRevA.68.063809
URIhttp://hdl.handle.net/10261/14834
DOI10.1103/PhysRevA.68.063809
ISSN1050-2947
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