{
  "abstract": "We construct a class of non-invertible duality defects, in (2+1)d quantum field theories, arising from half-spacetime gauging of a 2-group symmetry. Starting from a parent theory with two discrete and Abelian 0-form symmetries and a prescribed mixed anomaly, we show that gauging one factor produces a theory with a 2-group symmetry, while gauging the other yields a theory with a non-invertible 0-form symmetry, whose fusion rules we derive explicitly. When the parent theory possesses three such symmetries with a cyclic anomaly structure, gauging different factors can produce mutually dual theories and the half-spacetime gauging of the 2-group is implemented by a non-invertible duality defect, whose fusion rules we obtain. We illustrate the construction with explicit examples, including a $U(1)\\times U(1)\\times U(1)$ gauge theory and a general class of product theories. We also include a self-contained pedagogical introduction to the cohomological tools employed throughout the article.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.06287",
  "author_total": 3,
  "authors": [
    {
      "name": "Davide Bason"
    },
    {
      "name": "Wei Cui"
    },
    {
      "name": "Lorenzo Ruggeri"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bej5fmkh32fkx.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.06287",
  "fulltext_url": null,
  "id": "bej5fmkh32fkx",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.06287",
  "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",
      "hep-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.06287",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bej5fmkh32fkx.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2605.06287",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.06287"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Half-Spacetime Gauging of 2-Group Symmetry in 3d",
  "title_text": "Half-Spacetime Gauging of 2-Group Symmetry in 3d",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/bej5fmkh32fkx",
  "venue": "arXiv",
  "versions": []
}