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Quantum anomaly detection in the latent space of proton collision events at the LHC

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arxiv 2301.10780 v3 pith:YIRQGAQ5 submitted 2023-01-25 quant-ph cs.LGhep-ex

classification quant-phcs.LGhep-ex
keywords quantumanomalydetectionmachinealgorithmsdesignedenhancementevents
verification ladder T0 review T1 audit T2 compute T3 formal

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The ongoing quest to discover new phenomena at the LHC necessitates the continuous development of algorithms and technologies. Established approaches like machine learning, along with emerging technologies such as quantum computing show promise in the enhancement of experimental capabilities. In this work, we propose a strategy for anomaly detection tasks at the LHC based on unsupervised quantum machine learning, and demonstrate its effectiveness in identifying new phenomena. The designed quantum models, an unsupervised kernel machine and two clustering algorithms, are trained to detect new-physics events using a latent representation of LHC data, generated by an autoencoder designed to accommodate current quantum hardware limitations on problem size. For kernel-based anomaly detection, we implement an instance of the model on a quantum computer, and we identify a regime where it significantly outperforms its classical counterparts. We show that the observed performance enhancement is related to the quantum resources utilised by the model.

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Cited by 4 Pith papers

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

  1. Unlocking Multidimensional Integration with Quantum Adaptive Importance Sampling

    quant-ph 2025-06 conditional novelty 6.0 of 10

    QAIS uses a parameterized quantum circuit to allocate Monte Carlo samples along a learned non-separable density and achieves VEGAS-competitive or better accuracy on correlated integrands in simulation.

  2. Quantum similarity learning for anomaly detection

    hep-ph 2024-11 conditional novelty 5.0 of 10

    A hybrid Transformer-quantum circuit similarity-learning network reaches AUC 96.1% on simulated di-Higgs anomaly detection, slightly above a classical baseline, with clustering mitigating shot noise.

  3. Unsupervised Quantum Anomaly Detection on Noisy Quantum Processors

    quant-ph 2024-11 conditional novelty 4.0 of 10

    On a synthetic financial dataset, one-class SVMs using projected quantum kernels achieved higher mean F1 scores than a classical rbf-kernel baseline at every tested anomaly ratio, both in simulation and on quantum har...

  4. Overview of Applications of Quantum Computing in QCD

    hep-ph 2026-07 accept novelty 2.0 of 10

    A concise literature overview of quantum algorithms for QCD and collider tasks, stressing possible advantages over classical methods and NISQ hardware limits.

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