1. Detection of Sub-Shot-Noise Spatial Correlation in High-Gain Parametric Down Conversion
- Author
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Yun-Kun Jiang, Enrico Brambilla, Luigi A. Lugiato, Ottavia Jedrkiewicz, Alessandra Gatti, P. Di Trapani, and Morten Bache
- Subjects
Quantum optics ,Physics ,Spatial correlation ,Quantum Physics ,parametric down-conversion ,business.industry ,Quantum correlation ,Quantum noise ,Shot noise ,General Physics and Astronomy ,FOS: Physical sciences ,Optics ,Spontaneous parametric down-conversion ,business ,Quantum Physics (quant-ph) ,Quantum ,Quantum fluctuation ,quantum correlation ,twin beams - Abstract
Using a 1GW-1ps pump laser pulse in high gain parametric down-conversion allows us to detect sub-shot-noise spatial quantum correlation with up to one hundred photoelectrons per mode, by means of a high efficiency CCD. The statistics is performed in single-shot over independent spatial replica of the system. The paper highlights the evidence of quantum correlation between symmetrical signal and idler spatial areas in the far field, in the high gain regime. In accordance with the predictions of numerical calculations the observed transition from the quantum to the classical regime is interpreted as a consequence of the narrowing of the down-converted beams in the very high gain regime., Comment: 4,2 pages, 4 figures
- Published
- 2004
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