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An application of two photon entangled states to quantum metrology

Besides many interesting application to the study of foundations of quantum mechanics, entangled state are now assuming a large relevance for some practical application. In particular, we discuss most recent results obtained in our laboratory on the use of two photons entangled states produced in parametric down conversion for absolute quantum efficiency calibration of photodetectors, in photon counting regime.

preprint1999arXivOpen access
G. BridaM. GenoveseC. Novero
physics.opticsquant-ph
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G. BridaM. GenoveseC. Novero

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