{
  "id": "2506.16939",
  "version": "v1",
  "published": "2025-06-20T12:05:35.000Z",
  "updated": "2025-06-20T12:05:35.000Z",
  "title": "Dynamical Horizons and Black Hole Soft Hair",
  "authors": [
    "Albert Huber"
  ],
  "comment": "28 + 13 pages, 2 Figures",
  "categories": [
    "gr-qc",
    "astro-ph.SR",
    "hep-th"
  ],
  "abstract": "In the present work, quasilocal Brown-York charges are derived that coincide in the large sphere limit with the conserved supertranslation hair and superrotation charges introduced by Hawking, Perry and Strominger in [45, 46]. Given these charges, a general scenario is outlined in which a non-rotating black hole completely evaporates after its collapse due to particle creation effects, whereby a genuine one-way traversable event horizon is never formed, but merely a two-way traversable dynamical (resp. future trapping) horizon. The formation of such a dynamical horizon has the consequence, as is demonstrated, that quasilocal energy transported by the considered charges, and thus information, can continuously escape through the black hole horizon to infinity; a mechanism which, as is argued, could possibly prevent information loss once the black hole formation and evaporation process comes to an end.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2025-06-20T12:05:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black hole soft hair",
      "dynamical horizon",
      "genuine one-way traversable event horizon",
      "particle creation effects",
      "large sphere limit"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}