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Proceedings Paper

Pattern-function quantum tomography: a tool for experimentally investigating the real state of radiation fields
Author(s): Alberto Porzio; Virginia D'Auria; Salvatore Solimeno; Matteo G.A. Paris
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Paper Abstract

We have exploited pattern function quantum homodyne tomography (QHT) to enlight deviations from the Gaussian state for a squeezed vacuum field generated by a type-I below threshold OPO. This tomographic method allows to fully characterize the state without any a--priori assumption on its statistics. Applying pattern function QHT to the radiation outing a type-I below threshold OPO, we have measured photon number distributions different from those expected for a Gaussian field. Being the Wigner function and the quadrature marginal distribution Gaussian for a Gaussian field, the actual state has been analysed by looking at data variance and Kurtosis (0 for a Gaussian distribution) as a function of the quadrature angle θ. A clear deviation of the Kurtosis from zero has been found for different OPO cavities. This deviation increases as the threshold is approached.

Paper Details

Date Published: 25 August 2005
PDF: 10 pages
Proc. SPIE 5893, Quantum Communications and Quantum Imaging III, 589307 (25 August 2005); doi: 10.1117/12.617784
Show Author Affiliations
Alberto Porzio, CNR - INFM Coherentia, Univ. Monte Sant' Angelo (Italy)
Virginia D'Auria, CNR - INFM Coherentia, Univ. Monte Sant' Angelo (Italy)
Univ. degli Studi di Napoli Federico II (Italy)
Salvatore Solimeno, CNR - INFM Coherentia, Univ. Monte Sant' Angelo (Italy)
Univ. degli Studi di Napoli Federico II (Italy)
Matteo G.A. Paris, Univ. di Milano (Italy)


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

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