Pattern-function quantum tomography: a tool for experimentally investigating the real state of radiation fields

Alberto Porzio; Virginia D'Auria; Salvatore Solimeno; Matteo G.A. Paris

doi:10.1117/12.617784

25 August 2005 Pattern-function quantum tomography: a tool for experimentally investigating the real state of radiation fields

Alberto Porzio, Virginia D'Auria, Salvatore Solimeno, Matteo G.A. Paris

Author Affiliations +

Proceedings Volume 5893, Quantum Communications and Quantum Imaging III; 589307 (2005) https://doi.org/10.1117/12.617784
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

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Alberto Porzio, Virginia D'Auria, Salvatore Solimeno, and Matteo G.A. Paris "Pattern-function quantum tomography: a tool for experimentally investigating the real state of radiation fields", Proc. SPIE 5893, Quantum Communications and Quantum Imaging III, 589307 (25 August 2005); https://doi.org/10.1117/12.617784

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