arXiv:2510.06563quant-phcs.LG2025-10被引 3

量子机器学习可精准预测化学键解离能,表现媲美经典模型。

Adapting Quantum Machine Learning for Energy Dissociation of Bonds

  • 用量子电路编码原子与键特征,构建多种量子回归模型。
  • 量子模型在中等键能区间误差与经典深度网络相当,最高精度达1.23 kcal/mol。
  • 为未来量子计算化学提供可复现的基准,适合量子算法研究者参考。

准确预测键解离能(BDE)对理解反应机理和理性设计分子材料至关重要。本文系统性地比较了量子与经典机器学习模型在BDE预测中的表现,采用化学领域精心筛选的特征集,涵盖原子属性(原子序数、杂化状态)、键特性(键级、类型)及局部环境描述符。量子框架基于六量子比特的Qiskit Aer实现,使用ZZFeatureMap编码与变分量子线路(RealAmplitudes),测试了多种架构:变分量子回归器(VQR)、量子支持向量回归器(QSVR)、量子神经网络(QNN)、量子卷积神经网络(QCNN)和量子随机森林(QRF)。这些模型与强基线经典方法(如支持向量回归、随机森林、多层感知机)进行严格对比。评估涵盖绝对误差、相对误差、阈值精度与误差分布。结果显示,性能最优的量子模型(QCNN、QRF)在预测精度和鲁棒性上与经典集成模型和深度网络相当,尤其在化学常见的中等范围BDE区域表现优异。本研究建立了量子增强分子性质预测的透明基准,为推进量子计算化学迈向近化学精度提供了实用基础。

原文摘要 · Abstract (English)

Accurate prediction of bond dissociation energies (BDEs) underpins mechanistic insight and the rational design of molecules and materials. We present a systematic, reproducible benchmark comparing quantum and classical machine learning models for BDE prediction using a chemically curated feature set encompassing atomic properties (atomic numbers, hybridization), bond characteristics (bond order, type), and local environmental descriptors. Our quantum framework, implemented in Qiskit Aer on six qubits, employs ZZFeatureMap encodings with variational ansatz (RealAmplitudes) across multiple architectures Variational Quantum Regressors (VQR), Quantum Support Vector Regressors (QSVR), Quantum Neural Networks (QNN), Quantum Convolutional Neural Networks (QCNN), and Quantum Random Forests (QRF). These are rigorously benchmarked against strong classical baselines, including Support Vector Regression (SVR), Random Forests (RF), and Multi-Layer Perceptrons (MLP). Comprehensive evaluation spanning absolute and relative error metrics, threshold accuracies, and error distributions shows that top-performing quantum models (QCNN, QRF) match the predictive accuracy and robustness of classical ensembles and deep networks, particularly within the chemically prevalent mid-range BDE regime. These findings establish a transparent baseline for quantum-enhanced molecular property prediction and outline a practical foundation for advancing quantum computational chemistry toward near chemical accuracy.

量子机器学习键解离能量子计算化学

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