{
  "abstract": "The exact classical simulation of non-integrable quantum systems rapidly becomes intractable beyond small system sizes, yet its role is central to predicting many-body dynamics. Approximate methods alleviate this cost but typically lack rigorous guarantees on their deviation from the exact result. For the infinite-temperature correlation function, we derive a rigorous error bound for approximating the full dynamics within a computable finite-sized region. Applied to autocorrelations, this finite-region approach is especially accurate across one-dimensional systems and beyond, and can further provide rigorous error bounds for other approximate methods, demonstrated here for matrix-product-operator simulations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.35114",
  "author_total": 2,
  "authors": [
    {
      "name": "Alexander van Lomwel"
    },
    {
      "name": "Florian Mintert"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dzv54xg0qaxq6.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.35114",
  "fulltext_url": null,
  "id": "dzv54xg0qaxq6",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.35114",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Quantum many-body systems"
    ]
  ],
  "openalex": "W7214767498",
  "pdf_url": "https://arxiv.org/pdf/2609.35114",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dzv54xg0qaxq6.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.35114",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.35114"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Accurate and bounded approximation of quantum correlation functions",
  "title_text": "Accurate and bounded approximation of quantum correlation functions",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/dzv54xg0qaxq6",
  "venue": "arXiv",
  "versions": []
}