Quantum characterization of superconducting photon counters
Giorgio Brida, Luigi Ciavarella, Ivo P. Degiovanni, Marco Genovese,, Lapo Lolli, Maria G. Mingolla, Fabrizio Piacentini, Mauro Rajteri, Emanuele, Taralli, and Matteo G. A. Paris
TL;DR
This paper presents the first experimental quantum tomography of a superconducting transition-edge sensor (TES) photon counter, revealing its linear detection properties up to 11 photons and 100 incoming photons.
Contribution
It provides the first experimental POVM reconstruction of a TES photon counter, demonstrating its linear response in quantum measurements.
Findings
Successful POVM tomography up to 11 detected photons
Demonstration of TES linearity in photon detection
First experimental quantum characterization of a superconducting photon counter
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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