用量子混合模型提升AI决策可解释性,找出关键特征。
A Novel Approach to Explainable AI with Quantized Active Ingredients in Decision Making
- 结合量子与经典计算,构建可解释AI框架。
- 量子模型准确率达83.5%,特征重要性分布更集中(熵1.27)。
- 适合医疗、金融等需高可信度决策的场景。
人工智能在分类任务中表现优异,但在医疗、金融等高风险领域,缺乏可解释性成为重大挑战。本文提出一种基于量子玻尔兹曼机(QBMs)与经典玻尔兹曼机(CBMs)对比研究的可解释AI框架。通过主成分分析(PCA)预处理二值化且降维后的MNIST数据集,训练两类模型:QBMs采用强纠缠层的量子-经典混合电路,实现更丰富的潜在表示;CBMs则作为经典基线,使用对比散度进行训练。为评估可解释性,分别采用梯度显著性图(saliency maps)分析QBMs,SHAP值分析CBMs。实验表明,QBMs在分类准确率上显著优于CBMs(83.5% vs. 54%),且特征贡献分布熵更低(1.27 vs. 1.39),说明其能更清晰地识别出影响预测的关键特征。结果表明,量子-经典混合模型在提升准确率的同时增强了可解释性,推动更可信的AI系统发展。
原文摘要 · Abstract (English)
Artificial Intelligence (AI) systems have shown good success at classifying. However, the lack of explainability is a true and significant challenge, especially in high-stakes domains, such as health and finance, where understanding is paramount. We propose a new solution to this challenge: an explainable AI framework based on our comparative study with Quantum Boltzmann Machines (QBMs) and Classical Boltzmann Machines (CBMs). We leverage principles of quantum computing within classical machine learning to provide substantive transparency around decision-making. The design involves training both models on a binarised and dimensionally reduced MNIST dataset, where Principal Component Analysis (PCA) is applied for preprocessing. For interpretability, we employ gradient-based saliency maps in QBMs and SHAP (SHapley Additive exPlanations) in CBMs to evaluate feature attributions.QBMs deploy hybrid quantum-classical circuits with strongly entangling layers, allowing for richer latent representations, whereas CBMs serve as a classical baseline that utilises contrastive divergence. Along the way, we found that QBMs outperformed CBMs on classification accuracy (83.5% vs. 54%) and had more concentrated distributions in feature attributions as quantified by entropy (1.27 vs. 1.39). In other words, QBMs not only produced better predictive performance than CBMs, but they also provided clearer identification of "active ingredient" or the most important features behind model predictions. To conclude, our results illustrate that quantum-classical hybrid models can display improvements in both accuracy and interpretability, which leads us toward more trustworthy and explainable AI systems.
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