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Quantum characterization of superconducting photon counters

Published 15 Mar 2011 in quant-ph and cond-mat.supr-con | (1103.2991v4)

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.

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