Quantum tomography of a photon-number-resolving detector based on continuous time multiplexing: memory effect
G. V. Avosopiants, Konstantin G. Katamadze, N A Borshchevskaia, Yu. I. Bogdanov, S. P. Kulik · Laser Physics Letters · 2024
Abstract We address the characterization of a photon-number-resolving detector based on continuous time multiplexing. We develop and verify a mathematical model of this detector and explore various approaches to its quantum tomography. Additionally, we encounter a memory effect and discuss the feasibility of describing this type of detector using a transfer matrix or positive operator-valued measure (POVM) decomposition.