Correlations in photon-numbers and integrated intensities
in parametric processes involving three optical fields |
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Authors: | J?Pe?ina J?K?epelka Jr" target="_blank">J?Pe?inaJr M?Bondani A?Allevi A?Andreoni |
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Institution: | J. Pe?ina, J. K?epelka, J. Pe?ina Jr, M. Bondani, A. Allevi and A. Andreoni |
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Abstract: | Two strongly-pumped parametric interactions are
simultaneously realized in a single nonlinear crystal in order to
generate three strongly correlated optical fields. By combining
together the outputs of two of the three detectors measuring
intensities of the generated fields, we obtain the joint
photocount statistics between the single field and the sum of the
other two. We apply a microscopic quantum theory developed earlier
to determine the joint photon-number distribution and the joint
quasi-distributions of integrated intensities and prove
nonclassical nature of the three-mode state. Finally, by
performing a conditional measurement on the single field, we
obtain a state endowed with a sub-Poissonian statistics, as
testified by the analysis of the conditional Fano factor. The role
of quantum detection efficiencies in this conditional
state-preparation method is discussed in detail. |
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Keywords: | PACS" target="_blank">PACS 42 50 -p Quantum optics 42 50 Dv Quantum state engineering and measurements 42 50 Ar Photon statistics and coherence theory 03 65 Ud Entanglement and quantum nonlocality |
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