{
  "abstract": "We consider a many-body Hilbert space with a fixed global charge and show that the typical entanglement entropy of a subsystem, at the leading and subleading order in the thermodynamic limit, can be expressed in terms of a single quantity which represents the local thermal entropy at fixed charge density. We find a general formula which applies both to abelian U(1) U ( 1 ) symmetry and non-abelian SU(2) S U ( 2 ) symmetry, including the case of a local Hilbert space which transforms under a general reducible representation of the symmetry group. We illustrate the general formula with model systems and discuss the relevance of the results as a probe of quantum chaos for physical Hamiltonians.",
  "abstract_shown": true,
  "affiliations": [
    "Pennsylvania State University",
    "Aix-Marseille University",
    "French National Centre for Scientific Research",
    "Université de Toulon"
  ],
  "article_type": null,
  "arxiv": "2604.26141",
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Eugenio Bianchi",
      "orcid": "0000-0001-7847-9929"
    },
    {
      "affs": [
        1,
        2,
        3
      ],
      "name": "Pietro Donà",
      "orcid": "0000-0001-7341-0682"
    },
    {
      "affs": [
        0
      ],
      "name": "Erick Muiño",
      "orcid": "0000-0002-5631-0791"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bb18n81d93hw1.bib",
  "cited_by": 0,
  "doi": "10.21468/scipostphys.21.4.107",
  "fulltext_url": null,
  "id": "bb18n81d93hw1",
  "issns": [
    "2542-4653"
  ],
  "landing_url": "http://scipost.org/SciPostPhys.21.4.107",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "feed-journal",
      "physics/general"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.qphy"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://scipost.org/10.21468/SciPostPhys.21.4.107/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-06",
  "publisher": "SciPost Foundation",
  "ris": "https://research.draconitic.com/paper/bb18n81d93hw1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:17Z",
      "native_id": "10.21468/scipostphys.21.4.107",
      "source": "feed-scipost",
      "url": "http://scipost.org/SciPostPhys.21.4.107"
    },
    {
      "first_seen": "2026-10-30T12:17:49Z",
      "native_id": "hal-05782432",
      "source": "hal",
      "url": "https://hal.science/hal-05782432v1"
    },
    {
      "first_seen": "2026-10-30T12:17:57Z",
      "native_id": "10.21468/scipostphys.21.4.107",
      "source": "crossref",
      "url": "https://scipost.org/10.21468/SciPostPhys.21.4.107"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "hal:1.phys.qphy",
      "subfield": "quantum"
    }
  ],
  "title": "Typical entanglement entropy with charge conservation",
  "title_text": "Typical entanglement entropy with charge conservation",
  "type": "peer-reviewed",
  "updated_at": "2026-11-05T12:20:12Z",
  "url": "https://research.draconitic.com/paper/bb18n81d93hw1",
  "venue": "SciPost",
  "versions": []
}