arXiv:2512.17800quant-phcs.LG2025-12

DAQC通过图像先验优化量子电路,提升真实硬件上的图像分类性能。

Domain-Aware Quantum Circuit for QML

  • 基于图像局部性设计分块编码与纠缠,匹配设备连接结构。
  • 在真实量子硬件上超越经典模型,达到当前最佳表现。
  • 适合研究量子机器学习与图像分类的开发者使用。

在噪声中等规模量子(NISQ)设备上设计表达性强、可训练且抗硬件噪声的参数化量子电路(PQC)是量子机器学习(QML)的核心挑战。本文提出领域感知量子电路(DAQC),利用图像先验通过非重叠的DCT风格锯齿窗口实现保局编码与纠缠。采用交错的编码-纠缠-训练周期,纠缠仅作用于相邻像素对应的量子比特,符合设备连通性。该分阶段、保局的信息流扩展了有效感受野,无需深层全局混合,高效利用有限深度和量子比特。设计聚焦短程相关性表示能力,减少长程双量子比特操作,促进稳定优化,缓解深度引发及全局纠缠导致的平庸梯度问题。我们在MNIST、FashionMNIST和PneumoniaMNIST数据集上评估了DAQC。在真实量子硬件上,其性能媲美强健的经典基线(如ResNet-18/50、DenseNet-121、EfficientNet-B0),显著优于量子电路搜索(QCS)基线。据我们所知,DAQC作为仅用线性经典读出的量子特征提取器,目前在真实量子硬件上实现了基于QML的图像分类最佳报告性能。代码与预训练模型见:https://github.com/gurinder-hub/DAQC。

原文摘要 · Abstract (English)

Designing parameterized quantum circuits (PQCs) that are expressive, trainable, and robust to hardware noise is a central challenge for quantum machine learning (QML) on noisy intermediate-scale quantum (NISQ) devices. We present a Domain-Aware Quantum Circuit (DAQC) that leverages image priors to guide locality-preserving encoding and entanglement via non-overlapping DCT-style zigzag windows. The design employs interleaved encode-entangle-train cycles, where entanglement is applied among qubits hosting neighboring pixels, aligned to device connectivity. This staged, locality-preserving information flow expands the effective receptive field without deep global mixing, enabling efficient use of limited depth and qubits. The design concentrates representational capacity on short-range correlations, reduces long-range two-qubit operations, and encourages stable optimization, thereby mitigating depth-induced and globally entangled barren-plateau effects. We evaluate DAQC on MNIST, FashionMNIST, and PneumoniaMNIST datasets. On quantum hardware, DAQC achieves performance competitive with strong classical baselines (e.g., ResNet-18/50, DenseNet-121, EfficientNet-B0) and substantially outperforming Quantum Circuit Search (QCS) baselines. To the best of our knowledge, DAQC, which uses a quantum feature extractor with only a linear classical readout (no deep classical backbone), currently achieves the best reported performance on real quantum hardware for QML-based image classification tasks. Code and pretrained models are available at: https://github.com/gurinder-hub/DAQC.

量子机器学习图像分类量子电路设计

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