Recent progresses at IENGF on studies on quantum information

G. Brida; E. Cagliero; M. Genovese; M. Gramegna; E. Predazzi

doi:10.1117/12.614874

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12 September 2005 Recent progresses at IENGF on studies on quantum information

G. Brida, E. Cagliero, M. Genovese, M. Gramegna, E. Predazzi

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Proceedings Volume 5893, Quantum Communications and Quantum Imaging III; 58930J (2005) https://doi.org/10.1117/12.614874
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

In this proceeding we present the most recent studies performed at IEN "Galileo Ferraris" on quantum information by using quantum optical states. After a general summary of the most recent studies, among them we will present in some details the results of two recent experiments. The first was addressed to tomographic reconstruction of a quantum state by using an innovative theoretical scheme based on a variable quantum efficiency of the detector. This scheme has been applied to Fock (PDC heralded photons), coherent (attenuated laser beam) and thermal states, for which experimental results will be presented. The second was pointed to experimentally investigate the effects of fibre propagation of PDC light produced in a type II crystal and, in particular, to the restoration of entanglement due to wave packet dispersion. Also in this case we will present and discuss our most recent data. Finally, we will shortly acknowledge of realisation of a heralded photon source with strong spectral selection.

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G. Brida, E. Cagliero, M. Genovese, M. Gramegna, and E. Predazzi "Recent progresses at IENGF on studies on quantum information", Proc. SPIE 5893, Quantum Communications and Quantum Imaging III, 58930J (12 September 2005); https://doi.org/10.1117/12.614874

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