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Proceedings Paper

Recent progresses at IENGF on studies on quantum information
Author(s): G. Brida; E. Cagliero; M. Genovese; M. Gramegna; E. Predazzi
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Paper 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.

Paper Details

Date Published: 13 September 2005
PDF: 12 pages
Proc. SPIE 5893, Quantum Communications and Quantum Imaging III, 58930J (13 September 2005); doi: 10.1117/12.614874
Show Author Affiliations
G. Brida, Istituto Elettrotecnico Nazionale Galileo Ferraris (Italy)
E. Cagliero, Istituto Elettrotecnico Nazionale Galileo Ferraris (Italy)
M. Genovese, Istituto Elettrotecnico Nazionale Galileo Ferraris (Italy)
M. Gramegna, Istituto Elettrotecnico Nazionale Galileo Ferraris (Italy)
E. Predazzi, Univ. Torino, INFN (Italy)


Published in SPIE Proceedings Vol. 5893:
Quantum Communications and Quantum Imaging III
Ronald E. Meyers; Yanhua Shih, Editor(s)

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