Experimental realization of a measurement conditional unitary operation at single photon level and application to detector characterization

Marco Genovese; Giorgio Brida; Maria Chekhova; Marco Gramegna; Leonid Krivitsky; Sergej Kulik; Maria Luisa Rastello

doi:10.1117/12.561416

19 October 2004 Experimental realization of a measurement conditional unitary operation at single photon level and application to detector characterization

Marco Genovese, Giorgio Brida, Maria Chekhova, Marco Gramegna, Leonid Krivitsky, Sergej Kulik, Maria Luisa Rastello

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Proceedings Volume 5551, Quantum Communications and Quantum Imaging II; (2004) https://doi.org/10.1117/12.561416
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Our last experimental results on the realization of a measurement-conditional unitary operation at single photon level are presented. This gate operates by rotating by 90° the polarization of a photon produced by means of Type-II Parametric Down Conversion conditional to a polarization measurement on the correlated photon. We then propose a new scheme for measuring the quantum efficiency of a single photon detection apparatus by using this set-up. We present experimental results obtained with this scheme compared with traditional biphoton calibration. Our results show the interesting potentiality of the suggested scheme.

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Marco Genovese, Giorgio Brida, Maria Chekhova, Marco Gramegna, Leonid Krivitsky, Sergej Kulik, and Maria Luisa Rastello "Experimental realization of a measurement conditional unitary operation at single photon level and application to detector characterization", Proc. SPIE 5551, Quantum Communications and Quantum Imaging II, (19 October 2004); https://doi.org/10.1117/12.561416

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KEYWORDS

Polarization

Sensors

Photon polarization

Calibration

Signal detection

Quantum efficiency

Polarizers

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