Parameter identification in open quantum cavities
DOI:
https://doi.org/10.17979/ja-cea.2026.47.13712Keywords:
Parameter estimation, Nonlinear systems, Quantum control systems, Identification, NoiseAbstract
Characterizing environmental noise in open quantum systems is a key challenge in quantum technologies. In this work, this problem is addressed through a frequency-domain framework based on Volterra series, which enables the description of the dynamics by means of generalized frequency response functions (GFRFs).
We show that two-tone excitation generates spectral mixing components containing information about both the system parameters and the environmental noise, enabling their simultaneous estimation even in the presence of experimental noise.
Our results establish nonlinear spectral mixing as an effective tool for inferring properties of both the system and the environment from frequency-domain measurements.
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Copyright (c) 2026 Aitor Molina, Juan Ignacio Mulero Martínez, Alfonso Baños
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