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Quantum characterization of superconducting photon counters

By Giorgio Brida, Luigi Ciavarella, Ivo P. Degiovanni, Marco Genovese, Lapo Lolli, Maria G. Mingolla, Fabrizio Piacentini, Mauro Rajteri, Emanuele Taralli and Matteo G. A. Paris

Abstract

We address the quantum characterization of photon counters based on transition-edge sensors (TESs) and present the first experimental tomography of the positive operator-valued measure (POVM) of a TES. We provide the reliable tomographic reconstruction of the POVM elements up to 11 detected photons and M=100 incoming photons, demonstrating that it is a linear detector.Comment: 3 figures, NJP (to appear

Topics: Quantum Physics, Condensed Matter - Superconductivity
Year: 2012
DOI identifier: 10.1088/1367-2630/14/8/085001
OAI identifier: oai:arXiv.org:1103.2991
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