Experimental study of the spatial distribution of quantum correlations in a confocal Optical Parametric Oscillator

Details Experimental study of the spatial distribution of quantum correlations in a confocal Optical Parametric Oscillator Experimental study of the spatial distribution of quantum correlations in a confocal Optical Parametric Oscillator

2002-10-03

arxiv.org/abs/quant-ph/0210023v1

Physics

Quantum Physics

20 pages, 5 figures, submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.67.023808

We study experimentally the spatial distribution of quantum noise in the twin beams produced by a type II Optical Parametric Oscillator operating in a confocal cavity above threshold. The measured intensity correlations are at the same time below the standard quantum limit and not uniformly distributed inside the beams. We show that this feature is an unambiguous evidence for the multimode and nonclassical character of the quantum state generated by the device.

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