Clearer visibility of the Hong-Ou-Mandel effect with a correlation function based on rates rather than intensities
Krzysztof Rosołek , Kamil Kostrzewa , Arijit Dutta , Wiesław Laskowski , Marcin Wieśniak , Marek Żukowski
AbstractWe test ideas put forward, e.g., by Żukowski et al. [M. Żukowski et al., Phys. Rev. A 95, 042113 (2017)], which suggest that using rates in quantum optics can lead to better indicators of nonclassicality for states of quantum optical fields with undefined photon numbers. By rate we mean the ratio of registered photons in a given detector to the total number of detected photons in all detectors in a run of the experiment. For the Hong-Ou-Mandel effect for parametric down-conversion fields, we show that by using two detector correlation functions, which are defined in terms of averages of products of measured rates, rather than usual intensities, one can observe nonclassical visibilities beyond 1/2 for significantly higher pump rates. At such rates we already have the partially stimulated emission, which leads to significant amplitudes for multiple pairs production, still the approach allows us to clearly see the nonclassical dip. We consider both the perfect and imperfect detection efficiency.
|Other language title versions|
|Journal series||Physical Review A, ISSN 1050-2947|
|Publication size in sheets||0.5|
|Score|| = 35.0, 20-12-2017, ArticleFromJournal|
= 35.0, 20-12-2017, ArticleFromJournal
|Publication indicators||: 2016 = 2.925 (2) - 2016=2.716 (5)|
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