Giorgio Brida, Luigi Ciavarella, Ivo P. Degiovanni, Marco Genovese, Lapo Lolli, Maria G. Mingolla, Fabrizio Piacentini, Mauro Rajteri, Emanuele Taralli, Matteo G. A. Paris
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.
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http://arxiv.org/abs/1103.2991
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