Papers › Q-LIME π: A Quantum-Inspired Extension to LIME
Q-LIME π: A Quantum-Inspired Extension to LIME
Nelson Colón Vargas
Machine learning models offer powerful predictive capabilities but often lack transparency. Local Interpretable Model-agnostic Explanations (LIME) addresses this by perturbing features and measuring their impact on a model's output. In text-based tasks, LIME typically removes present words (bits set to 1) to identify high-impact tokens. We propose \textbf{Q-LIME π} (Quantum LIME π), a quantum-inspired extension of LIME that encodes a binary feature vector in a quantum state, leveraging superposition and interference to explore local neighborhoods more efficiently. Our method focuses on flipping bits from 1 →0 to emulate LIME's ``removal'' strategy, and can be extended to 0 →1 where adding features is relevant. Experiments on subsets of the IMDb dataset demonstrate that Q-LIME π often achieves near-identical top-feature rankings compared to classical LIME while exhibiting lower runtime in small- to moderate-dimensional feature spaces. This quantum-classical hybrid approach thus provides a new pathway for interpretable AI, suggesting that, with further improvements in quantum hardware and methods, quantum parallelism may facilitate more efficient local explanations for high-dimensional data.
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