{
  "abstract": "A bstract : We investigate an approach to determine corner Poisson brackets of fields restricted to codimension 2 and 3 surfaces in 4D theories, without making use of boundary conditions. Instead, within the example of BF-BB type theories, we show that the constraint/generator algebra on a partial Cauchy slice is enough to determine the Poisson brackets and a corner symplectic form, useful in extended phase space constructions or holography. The codimension 2 phase space turns out to be of Chern-Simons type, but lacking a flatness constraint. In a setting with codimension 3 surfaces, there is also a further Wess-Zumino-type current algebra. We apply this approach also to a specific formulation of full 4D gravity, based on the Maxwell algebra $$ \\mathfrak{g}=\\mathfrak{so}\\left(1,3\\right)\\ltimes \\left({\\mathbb{R}}^{1,3}\\overset{\\sim }{\\oplus}\\mathfrak{so}{\\left(1,3\\right)}^{\\ast}\\right) $$ g = so 1 3 ⋉ ℝ 1 , 3 ⊕ ~ so 1 3 ∗ . This realises the corner Poisson bracket of the spin connection for the first time and shows it is off-shell commutative, while the corner metric is noncommutative.",
  "abstract_shown": true,
  "affiliations": [
    "Perimeter Institute"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Simon Langenscheidt",
      "orcid": "0000-0002-5122-8406"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dddncs2hwfm6x.bib",
  "cited_by": 0,
  "doi": "10.1007/jhep10(2026)028",
  "fulltext_url": null,
  "id": "dddncs2hwfm6x",
  "issns": [
    "1029-8479"
  ],
  "landing_url": "https://link.springer.com/10.1007/JHEP10(2026)028",
  "language": null,
  "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": [
    [
      "openalex",
      "3106|Black Holes and Theoretical Physics"
    ]
  ],
  "openalex": "W7133900028",
  "pdf_url": "https://link.springer.com/content/pdf/10.1007/JHEP10(2026)028.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-02",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/dddncs2hwfm6x.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:01Z",
      "native_id": "10.1007/jhep10(2026)028",
      "source": "crossref",
      "url": "https://link.springer.com/10.1007/JHEP10(2026)028"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3106|Black Holes and Theoretical Physics",
      "subfield": "high-energy"
    }
  ],
  "title": "Chern-Simons corner phase spaces in BF-BB theories",
  "title_text": "Chern-Simons corner phase spaces in BF-BB theories",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:01Z",
  "url": "https://research.draconitic.com/paper/dddncs2hwfm6x",
  "venue": "Journal of High Energy Physics",
  "versions": []
}