Experimental demonstration of quantum entanglement between frequency-nondegenerate optical twin beams

The quantum entanglement of amplitude and phase quadratures between two intense optical beams with a total intensity of 22 mW and a frequency difference of 1 nm, which are produced from an optical parametric oscillator operating above threshold, is experimentally demonstrated with two sets of unbala...

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Veröffentlicht in:	Optics letters 2006-04, Vol.31 (8), p.1133-1135
Hauptverfasser:	Su, Xiaolong, Tan, Aihong, Jia, Xiaojun, Pan, Qing, Xie, Changde, Peng, Kunchi
Format:	Artikel
Sprache:	eng
Schlagworte:	Classical and quantum physics: mechanics and fields Exact sciences and technology Fundamental areas of phenomenology (including applications) Nonclassical field states squeezed, antibunched and sub-poissonian states operational definitions of the phase of the field phase measurements Optics Physics Quantum information Quantum optics
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Beschreibung
Zusammenfassung:	The quantum entanglement of amplitude and phase quadratures between two intense optical beams with a total intensity of 22 mW and a frequency difference of 1 nm, which are produced from an optical parametric oscillator operating above threshold, is experimentally demonstrated with two sets of unbalanced Mach-Zehnder interferometers. The measured quantum correlations of intensity and phase are in reasonable agreement with the results calculated based on a semiclassical analysis of the noise characteristics given by Fabre et al. [J. Phys. (France) 50, 1209 (1989)].
ISSN:	0146-9592 1539-4794
DOI:	10.1364/OL.31.001133