{
  "abstract": "A bstract : We study how bulk propagation in global AdS ₃ is reflected in boundary energy densities of the dual CFT ₂ on the cylinder. A key feature of the global geometry, which is absent in the Poincaré-patch description, is that a null excitation emitted from the boundary reaches the antipodal boundary point after ∆ τ = π and returns to the original boundary point after ∆ τ = 2 π . We show that the CFT energy density reproduces this sequence through two chiral peaks that move along the boundary light-cone directions, meet at the antipodal point, and return to the original point after one global period. For a wave-packet state, the leading energy density consists of two chiral peaks moving along the boundary light-cone directions; their relative weights encode the impact parameter of the corresponding bulk null ray. For a state constructed from an operator of large conformal dimension with a Euclidean time regulator (LCD state), the exact cylinder stress tensor gives two periodic chiral pulses moving along the boundary light-cone directions. These pulses reach the antipodal point and return to the original point at the same global times as the radial null geodesic in the bulk. Thus the boundary energy density provides a time-dependent boundary profile that reflects characteristic global features of null propagation in AdS ₃ .",
  "abstract_shown": true,
  "affiliations": [
    "Kyoto University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Shiki Yoshikawa",
      "orcid": "0009-0001-2929-4052"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e8ee1948abfd7.bib",
  "cited_by": 0,
  "doi": "10.1007/jhep10(2026)075",
  "fulltext_url": null,
  "id": "e8ee1948abfd7",
  "issns": [
    "1029-8479"
  ],
  "landing_url": "https://link.springer.com/10.1007/JHEP10(2026)075",
  "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": "W7220904069",
  "pdf_url": "https://link.springer.com/content/pdf/10.1007/JHEP10(2026)075.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-07",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/e8ee1948abfd7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:01Z",
      "native_id": "10.1007/jhep10(2026)075",
      "source": "crossref",
      "url": "https://link.springer.com/10.1007/JHEP10(2026)075"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3106|Black Holes and Theoretical Physics",
      "subfield": "high-energy"
    }
  ],
  "title": "Boundary energy density and null propagation in global AdS3/CFT2",
  "title_text": "Boundary energy density and null propagation in global AdS3/CFT2",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:01Z",
  "url": "https://research.draconitic.com/paper/e8ee1948abfd7",
  "venue": "Journal of High Energy Physics",
  "versions": []
}