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Intensity-intensity correlations as a probe of interferences under conditions of noninterference in the intensity

By G. Agarwal, J. von Zanthier, C. Skornia and H. Walther


The different behavior of first-order interferences and second-order correlations are investigated for the case of two coherently excited atoms. For intensity measurements this problem is in many respects equivalent to Young's double-slit experiment and was investigated in an experiment by Eichmann [Phys. Rev. Lett. 70, 2359 (1993)] and later analyzed in detail by Itano [Phys. Rev. A 57, 4176 (1998)]. Our results show that in cases where the intensity interferences disappear the intensity-intensity correlations can display an interference pattern with a visibility of up to 100%. The contrast depends on the polarization selected for the detection and is independent of the strength of the driving field. The nonclassical nature of the calculated intensity-intensity correlations is also discussed

Year: 2002
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Provided by: MPG.PuRe
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