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The role of data embedding in quantum autoencoders for improved anomaly detection

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arxiv 2409.04519 v1 pith:USHGVJA3 submitted 2024-09-06 quant-ph cs.AIcs.LGphysics.data-an

The role of data embedding in quantum autoencoders for improved anomaly detection

classification quant-ph cs.AIcs.LGphysics.data-an
keywords embeddingdataanomalydetectionrepresentabilityautoencodersdatasetsdifferent
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The performance of Quantum Autoencoders (QAEs) in anomaly detection tasks is critically dependent on the choice of data embedding and ansatz design. This study explores the effects of three data embedding techniques, data re-uploading, parallel embedding, and alternate embedding, on the representability and effectiveness of QAEs in detecting anomalies. Our findings reveal that even with relatively simple variational circuits, enhanced data embedding strategies can substantially improve anomaly detection accuracy and the representability of underlying data across different datasets. Starting with toy examples featuring low-dimensional data, we visually demonstrate the effect of different embedding techniques on the representability of the model. We then extend our analysis to complex, higher-dimensional datasets, highlighting the significant impact of embedding methods on QAE performance.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Spectral Geometry and Bosonic-Bloch Probes: Explorations in Quantum Learning

    quant-ph 2026-06 unverdicted novelty 5.0

    Training in graph-regularized quantum networks increases spectral dimension by 0.23 and enables anomaly detection via Bloch drift (ROC-AUC ≥0.9) while bosonic enhancement correlates with Fiedler splits (r=-0.50).

  2. Spectral Geometry and Bosonic-Bloch Probes: Explorations in Quantum Learning

    quant-ph 2026-06 conditional novelty 5.0

    Learning-induced spectral structure in hybrid quantum models is diagnosed by edge-resolved two-boson interference correlated with Fiedler cuts and by absolute Bloch drift that separates anomalies from benign states.

  3. Compression-Driven Anomaly Detection in Brain MRI Using an Interpretable Quantum Autoencoder

    quant-ph 2026-06 unverdicted novelty 5.0

    A variational quantum autoencoder detects anomalies in brain MRI by scoring resistance to compression, reporting slice-level ROC-AUC of 0.95 and outperforming classical autoencoders and PCA on public datasets.

  4. Spectral Geometry and Bosonic-Bloch Probes: Explorations in Quantum Learning

    quant-ph 2026-06 unverdicted novelty 4.0

    Training reorganizes output similarity graphs in quantum networks, increasing spectral dimension by 0.23, with bosonic interference correlations and Bloch drift enabling high-ROC-AUC anomaly detection via a proposed s...