We introduce and validate a machine-learning assisted quantum sensing protocol to classify spatial and temporal correlations of classical noise affecting two ultrastrongly coupled qubits. We consider six distinct classes of Markovian and non-Markovian noise. Leveraging the sensitivity of a coherent population transfer protocol under three distinct driving conditions, the various forms of noise are discriminated by only measuring the final transfer efficiencies. Our approach achieves ≳94% accuracy in classification providing a near-perfect discrimination between Markovian and non-Markovian noise. The method requires minimal experimental resources, relying on a simple driving scheme providing three inputs to a shallow neural network with no need of measuring time-series data or real-time monitoring. The machine-learning data analysis acquires information from non-idealities of the coherent protocol highlighting how combining these techniques may significantly improve the characterization of quantum-hardware.
@article{arxiv.2509.03389,
title = {Detection of noise correlations in two qubit systems by Machine Learning},
author = {Dario Fasone and Shreyasi Mukherjee and Dario Penna and Fabio Cirinnà and Mauro Paternostro and Elisabetta Paladino and Luigi Giannelli and Giuseppe A. Falci},
journal= {arXiv preprint arXiv:2509.03389},
year = {2026}
}