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.
Cite
@article{arxiv.1103.2991,
title = {Quantum characterization of superconducting photon counters},
author = {Giorgio Brida and Luigi Ciavarella and Ivo P. Degiovanni and Marco Genovese and Lapo Lolli and Maria G. Mingolla and Fabrizio Piacentini and Mauro Rajteri and Emanuele Taralli and Matteo G. A. Paris},
journal= {arXiv preprint arXiv:1103.2991},
year = {2015}
}