{
  "abstract": "The Bekenstein-Hawking entropy, proportional to one quarter of the horizon area, is fundamental in black hole thermodynamics and can also be understood via the AdS/CFT correspondence, such as the 3D BTZ black hole and 2D CFT. In this work, we adopt the Kerr/CFT approach to analyze the central charge and black hole entropy for regular extremal black-bounce spacetimes, including the counterparts of the Kerr, Kerr-Newman, and Reissner-Nordström black holes. These spacetimes are free of curvature singularities at $r=0$. We derive the near horizon geometries of these spacetimes and find that they exhibit enhanced symmetry, namely SL$(2,\\mathbb{R})\\times \\mathrm{U}(1)$ or SL$(2,\\mathbb{R}) \\times \\mathrm{SO}(3)$. By imposing appropriate boundary conditions, we analyze their asymptotic symmetry groups, which contain diffeomorphisms as well as the $\\mathrm{U}(1)_{\\rm gauge}$ symmetry arising from the electromagnetic field. We then extract the central charge from the charge algebra and evaluate the left-moving temperature of the Frolov-Thorne vacuum. It is worth emphasizing that in the black-bounce Kerr-Newman case, the central charge from the electromagnetic contribution vanishes. Furthermore, in the black-bounce Reissner-Nordström case, we uplift the 4D geometry to a 5D configuration by incorporating a $\\mathrm{U}(1)$ gauge fiber. Our results show that the microscopic entropy calculated from the Cardy formula is consistent with the Bekenstein-Hawking entropy. This agreement suggests that the Kerr/CFT approach remains valid for certain regular spacetimes without curvature singularities, thereby providing a microscopic statistical understanding of black hole entropy.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.18028",
  "author_total": 4,
  "authors": [
    {
      "name": "Xu Ye"
    },
    {
      "name": "Shan-Ping Wu"
    },
    {
      "name": "Yu-Kun Zhang"
    },
    {
      "name": "Shao-Wen Wei"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bey9gdjk46s1x.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.18028",
  "fulltext_url": null,
  "id": "bey9gdjk46s1x",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.18028",
  "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",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3106|Black Holes and Theoretical Physics"
    ]
  ],
  "openalex": "W7213513680",
  "pdf_url": "https://arxiv.org/pdf/2609.18028",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bey9gdjk46s1x.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.18028",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.18028"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Central charge and black hole entropy for regular extremal black-bounce spacetimes",
  "title_text": "Central charge and black hole entropy for regular extremal black-bounce spacetimes",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/bey9gdjk46s1x",
  "venue": "arXiv",
  "versions": []
}