Quantum characterization of superconducting photon counters
Giorgio Brida, Luigi Ciavarella, Ivo Pietro Degiovanni, Marco Genovese, Lapo Lolli, Maria Griselda Mingolla, Fabrizio Piacentini, Mauro Rajteri, Emanuele Taralli, Matteo G A Paris · New Journal of Physics · 2012
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.