Opportunities and limitations of explaining quantum machine learning

TL;DR

This paper explores the challenges and opportunities in explaining quantum machine learning models, proposing new explanation methods and outlining future research directions to enhance trust and understanding in the field.

Contribution

It introduces the first quantum-specific explanation methods and provides a comprehensive overview of the current state and future prospects of explainability in quantum machine learning.

Findings

Proposed two novel explanation methods for quantum models

Compared existing and new explainability techniques

Outlined promising research avenues for quantum explainability

Abstract

A common trait of many machine learning models is that it is often difficult to understand and explain what caused the model to produce the given output. While the explainability of neural networks has been an active field of research in the last years, comparably little is known for quantum machine learning models. Despite a few recent works analyzing some specific aspects of explainability, as of now there is no clear big picture perspective as to what can be expected from quantum learning models in terms of explainability. In this work, we address this issue by identifying promising research avenues in this direction and lining out the expected future results. We additionally propose two explanation methods designed specifically for quantum machine learning models, as first of their kind to the best of our knowledge. Next to our pre-view of the field, we compare both existing and novel methods to explain the predictions of quantum learning models. By studying explainability in quantum machine learning, we can contribute to the sustainable development of the field, preventing trust issues in the future.