{
  "abstract": "We introduce dithered belief-propagation decoding for circuit-level quantum memory to mitigate the oscillations and trapping behavior that limit standard belief-propagation (BP) decoders for qLDPC codes. Our approach combines a quantum-adapted sign-flip mechanism with chained randomized prior perturbation. Evaluated under circuit-level noise on the distance-11 rotated surface code and the distance-12 bivariate-bicycle code, the proposed dithered decoder significantly outperforms BP and BP+OSD+CS-10. The proposed decoder achieves accuracy comparable to or better than state-of-the-art Relay-BP, especially at higher physical error rates, while trading a moderate increase in additions for about 98% fewer multiplications on average and eliminating node-level RNGs. These results suggest that dithering is a promising approach toward real-time decoding of quantum memories.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.07144",
  "author_total": 4,
  "authors": [
    {
      "name": "Zhengyu Cai"
    },
    {
      "name": "Mohamad Ali Jarkas"
    },
    {
      "name": "Bokun Zhao"
    },
    {
      "name": "Warren J. Gross"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/81wq76qrxw27m.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.07144",
  "fulltext_url": null,
  "id": "81wq76qrxw27m",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.07144",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cs.IT"
    ],
    [
      "arxiv",
      "math.IT"
    ],
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.07144",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/81wq76qrxw27m.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T18:21:30Z",
      "native_id": "2611.07144",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.07144"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.IT",
      "subfield": "general"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Dithered Belief Propagation for Real-Time Quantum Memory Decoding",
  "title_text": "Dithered Belief Propagation for Real-Time Quantum Memory Decoding",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:47Z",
  "url": "https://research.draconitic.com/paper/81wq76qrxw27m",
  "venue": "arXiv",
  "versions": []
}