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Proceedings Paper

Some recent progresses in quantum tomography realised at INRIM
Author(s): F. Piacentini; E. A. Goldschmidt; Maria G. Mingolla; I. P. Degiovanni; M. Gramegna; I. R. Berchera; S. V. Polyakov; S. Peters; S. Kück; E. Taralli; L. Lolli; M. Rajteri; M. G. A. Paris; A. Migdall; G. Brida; M. Genovese
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Paper Abstract

We present some Quantum Tomography related results recently obtained in the Quantum Optics labs of the National Institute of Metrological Research (INRIM). Initially we describe the first experimental implementation of a new protocol for the reconstruction of a photon-number-resolving (PNR) detector’s POVM (Positive Operator-Valued Measure): such a protocol, exploiting the strong quantum correlations of an ancillary state, results more robust and efficient than its classical counterparts. The second part of the paper focuses on the quantum characterization of a transition-edge sensor (TES) based PNR detector, i.e. the experimental tomography of the POVM of a TES, with a method based on a quorum of coherent probes: we show the reconstruction of the POVM elements up to 11 detected photons and 100 incoming photons, demonstrating the linearity of such a device. Finally, we present a method for the experimental reconstruction of the modal structure of multimode optical fields exploiting a single measurement of higher-order photon number autocorrelation functions. We show our reconstructions of up to three different modes per optical state, demonstrating the excellent agreement with the theoretical predictions and the robustness of our method itself.

Paper Details

Date Published: 26 September 2013
PDF: 13 pages
Proc. SPIE 8875, Quantum Communications and Quantum Imaging XI, 88750G (26 September 2013); doi: 10.1117/12.2023067
Show Author Affiliations
F. Piacentini, Istituto Nazionale di Ricerca Metrologica (Italy)
E. A. Goldschmidt, Joint Quantum Institute, Univ. of Maryland and National Institute of Standards and Technology (United States)
Maria G. Mingolla, Istituto Nazionale di Ricerca Metrologica (Italy)
Politecnico di Torino (Italy)
Instituto Nacional de Tecnologia Industrial (Argentina)
I. P. Degiovanni, Istituto Nazionale di Ricerca Metrologica (Italy)
M. Gramegna, Istituto Nazionale di Ricerca Metrologica (Italy)
I. R. Berchera, Istituto Nazionale di Ricerca Metrologica (Italy)
S. V. Polyakov, Joint Quantum Institute, Univ. of Maryland and National Institute of Standards and Technology (United States)
S. Peters, Physikalisch-Technische Bundesanstalt (Germany)
S. Kück, Physikalisch-Technische Bundesanstalt (Germany)
E. Taralli, Istituto Nazionale di Ricerca Metrologica (Italy)
L. Lolli, Istituto Nazionale di Ricerca Metrologica (Italy)
M. Rajteri, Istituto Nazionale di Ricerca Metrologica (Italy)
M. G. A. Paris, Univ. degli Studi di Milano (Italy)
A. Migdall, Joint Quantum Institute, Univ. of Maryland and National Institute of Standards and Technology (United States)
G. Brida, Istituto Nazionale di Ricerca Metrologica (Italy)
M. Genovese, Istituto Nazionale di Ricerca Metrologica (Italy)


Published in SPIE Proceedings Vol. 8875:
Quantum Communications and Quantum Imaging XI
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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