We implement a direct detection scheme based on hybrid photodetectors to experimentally investigate high- order correlations for detected photons by means of experimentally accessible quantities. The scheme is self- consistent, allowing the estimation of all the involved parameters (quantum efficiency, number of modes, and average energy). In particular, we show how high-order correlation functions can be exploited to fully characterize bipartite multimode states in regimes realistic for quantum technology, that is, in the mesoscopic photon-number domain and with limited quantum efficiency. Furthermore, we introduce a nonclassicality criterion based on a simple linear combination of high-order correlation functions.
Measuring high-order photon-number correlations in experiments with multimode pulsed quantum states
ALLEVI, ALESSIA
;
2012-01-01
Abstract
We implement a direct detection scheme based on hybrid photodetectors to experimentally investigate high- order correlations for detected photons by means of experimentally accessible quantities. The scheme is self- consistent, allowing the estimation of all the involved parameters (quantum efficiency, number of modes, and average energy). In particular, we show how high-order correlation functions can be exploited to fully characterize bipartite multimode states in regimes realistic for quantum technology, that is, in the mesoscopic photon-number domain and with limited quantum efficiency. Furthermore, we introduce a nonclassicality criterion based on a simple linear combination of high-order correlation functions.File | Dimensione | Formato | |
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PhysRevA.85.063835.pdf
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