Quantum Extreme Reservoir Computing for Phase Classification of Polymer Alloy Microstructures

TL;DR

This paper demonstrates the application of quantum extreme reservoir computing to classify polymer alloy microstructures, showing promising results and practical guidelines for quantum model design in materials informatics.

Contribution

It introduces the use of quantum reservoir computing for engineering data classification, specifically polymer microstructures, and analyzes key parameters affecting performance.

Findings

QERC effectively classifies polymer microstructures.

Performance depends on qubits, sampling, and reservoir configuration.

Phase diagrams link quantum outputs to material behavior.

Abstract

Quantum machine learning (QML) is expected to offer new opportunities to process high-dimensional data efficiently by exploiting the exponentially large state space of quantum systems. In this work, we apply quantum extreme reservoir computing (QERC) to the classification of microstructure images of polymer alloys generated using self-consistent field theory (SCFT). While previous QML efforts have primarily focused on benchmark datasets such as MNIST, our work demonstrates the applicability of QERC to engineering data with direct materials relevance. Through numerical experiments, we examine the influence of key computational parameters-including the number of qubits, sampling cost (the number of measurement shots), and reservoir configuration-on classification performance. The resulting phase classifications are depicted as phase diagrams that illustrate the phase transitions in polymer morphology, establishing an understandable connection between quantum model outputs and material behavior. These results illustrate QERC performance on realistic materials datasets and suggest practical guidelines for quantum encoder design and model generalization. This work establishes a foundation for integrating quantum learning techniques into materials informatics.