Breaking concentration barriers for quantum extreme learning on digital quantum processors

Fuente: arXiv
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Auteurs principaux: Dao, Timothée, Yilmaz, Ege, Shehzad, Ibrahim, Pere, Christophe, Ghosh, Kumar, Wittmann, Isabelle, Brunschwiler, Thomas, Cortiana, Giorgio, O'Meara, Corey, Woerner, Stefan, Tacchino, Francesco
Format: Preprint
Publié: 2026
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author Dao, Timothée
Yilmaz, Ege
Shehzad, Ibrahim
Pere, Christophe
Ghosh, Kumar
Wittmann, Isabelle
Brunschwiler, Thomas
Cortiana, Giorgio
O'Meara, Corey
Woerner, Stefan
Tacchino, Francesco
author_facet Dao, Timothée
Yilmaz, Ege
Shehzad, Ibrahim
Pere, Christophe
Ghosh, Kumar
Wittmann, Isabelle
Brunschwiler, Thomas
Cortiana, Giorgio
O'Meara, Corey
Woerner, Stefan
Tacchino, Francesco
contents Reservoir computing leverages rich, non-linear dynamics to process temporal data. Quantum variants promise enhanced expressivity from high-dimensional Hilbert spaces, yet their practical applicability is hindered by hardware noise and concentration effects that can erase input-output distinguishability at large system sizes. In this work, we present and experimentally demonstrate a Quantum Extreme Learning Machine (QELM) tailored to state-of-the-art superconducting platforms, employing up to 124 qubits and circuits with more than 5,000 two-qubit gates on IBM Quantum computers. We introduce a practical multi-objective hyperparameter tuning strategy that jointly monitors observable variability, capacity, and task performance to identify noise-robust operating points. In addition, we develop a local eigentask analysis that enables computationally efficient feature selection and effective information retrieval. We report evidence of a regime of optimality that is identifiable at small scales and transferable across tasks and larger systems, and we achieve performances competitive with leading classical baselines on representative benchmarks for time-series forecasting and satellite image classification. Together, our results establish a viable and robust framework for large-scale, pre-fault-tolerant quantum machine learning and provide a foundation for extending reservoir-based methods to more expressive architectures and real-world scenarios.
format Preprint
id arxiv_https___arxiv_org_abs_2603_13005
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Breaking concentration barriers for quantum extreme learning on digital quantum processors
Dao, Timothée
Yilmaz, Ege
Shehzad, Ibrahim
Pere, Christophe
Ghosh, Kumar
Wittmann, Isabelle
Brunschwiler, Thomas
Cortiana, Giorgio
O'Meara, Corey
Woerner, Stefan
Tacchino, Francesco
Quantum Physics
Reservoir computing leverages rich, non-linear dynamics to process temporal data. Quantum variants promise enhanced expressivity from high-dimensional Hilbert spaces, yet their practical applicability is hindered by hardware noise and concentration effects that can erase input-output distinguishability at large system sizes. In this work, we present and experimentally demonstrate a Quantum Extreme Learning Machine (QELM) tailored to state-of-the-art superconducting platforms, employing up to 124 qubits and circuits with more than 5,000 two-qubit gates on IBM Quantum computers. We introduce a practical multi-objective hyperparameter tuning strategy that jointly monitors observable variability, capacity, and task performance to identify noise-robust operating points. In addition, we develop a local eigentask analysis that enables computationally efficient feature selection and effective information retrieval. We report evidence of a regime of optimality that is identifiable at small scales and transferable across tasks and larger systems, and we achieve performances competitive with leading classical baselines on representative benchmarks for time-series forecasting and satellite image classification. Together, our results establish a viable and robust framework for large-scale, pre-fault-tolerant quantum machine learning and provide a foundation for extending reservoir-based methods to more expressive architectures and real-world scenarios.
title Breaking concentration barriers for quantum extreme learning on digital quantum processors
topic Quantum Physics
url https://arxiv.org/abs/2603.13005