Quantum characterization of superconducting photon counters
arXiv:1103.2991 · doi:10.1088/1367-2630/14/8/085001
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.
3 figures, NJP (to appear)