{
  "abstract": "The unification of quantum theory and general relativity suggests the existence of a minimal measurable length, leading to a generalized uncertainty principle (GUP) and an energy-dependent vacuum group velocity. Testing these effects with macroscopic objects typically encounters the ``soccer-ball problem,'' where applying Planck-scale deformations to the total momentum predicts observationally ruled-out velocity deviations. We adopt the QFT-natural prescription in which the GUP modifies single-mode commutators, and verify by explicit calculation that the macroscopic group velocity of a multimode coherent pulse reduces to the single-photon GUP velocity evaluated at the central wavelength, multiplied by the classical Gaussian-beam factor, with no dependence on the total pulse energy. The energy--momentum relation $E=pc$ itself is unmodified; the deformation enters through the velocity--momentum relation and is equivalent to a modified dispersion relation in the wave vector, with a quadratic coefficient that depends on which of the two variables is used. The soccer-ball problem $\\,$---$\\,$ which arises only when the GUP is applied to the center-of-mass momentum of a composite system $\\,$---$\\,$ is therefore absent for coherent light, and macroscopic petawatt pulses probe the same parameter space as single high-energy photons. Building on this framework, we propose a two-color vacuum chronoscopy experiment using a short-pulse petawatt laser and its high-harmonic generation. By systematically varying the macroscopic beam waist, our setup separates Planck-scale kinematic shifts from classical diffraction delays, establishing a controlled, source-independent terrestrial methodology whose sensitivity we assess against current astrophysical bounds and against the dominant waist-independent systematics that limit it, residual-gas dispersion and the harmonic birth-time offset.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. D 114, 095011 (2026)",
  "arxiv": "2610.26892",
  "author_total": 3,
  "authors": [
    {
      "name": "Zhi-Wei Wang"
    },
    {
      "name": "Saurya Das"
    },
    {
      "name": "Samuel L. Braunstein"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7fwka6h220ekf.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.26892",
  "fulltext_url": null,
  "id": "7fwka6h220ekf",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.26892",
  "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-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.26892",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7fwka6h220ekf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:04Z",
      "native_id": "2610.26892",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.26892"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Minimal-length kinematics of coherent light and a proposed two-color vacuum chronoscopy",
  "title_text": "Minimal-length kinematics of coherent light and a proposed two-color vacuum chronoscopy",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:38Z",
  "url": "https://research.draconitic.com/paper/7fwka6h220ekf",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/qb5g-7khs",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}