{
  "abstract": "We study spin correlations and quantum entanglement in the process $γγ\\to t\\bar t$ with the photons coming from Compton backscattered laser beam. We present predictions for the cross sections and spin observables including next-to-leading order (NLO) QCD corrections under various beam-polarization configurations. The NLO QCD corrections significantly enhance the total cross section while having only a minor impact on spin observables. Using the spin density matrix of the $t\\bar t$ system, we further investigate quantum entanglement and Bell nonlocality. We find that the entanglement is the strongest near the $t\\bar t$ invariant-mass threshold, while both entanglement and Bell nonlocality are highly sensitive to the initial beam polarization. Our results provide a theoretical basis for future studies of quantum correlations in top-quark pair production at photon colliders.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.21152",
  "author_total": 4,
  "authors": [
    {
      "name": "Jun Jiang"
    },
    {
      "name": "Zong-Guo Si"
    },
    {
      "name": "Han Zhang"
    },
    {
      "name": "Xin-Yi Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/875ryd1a5tr3w.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.21152",
  "fulltext_url": null,
  "id": "875ryd1a5tr3w",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.21152",
  "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",
      "hep-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.21152",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/875ryd1a5tr3w.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:21:14Z",
      "native_id": "2606.21152",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.21152"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Spin correlations and quantum entanglement in $γγ\\to t\\bar t$ at polarized photon colliders with NLO QCD corrections",
  "title_text": "Spin correlations and quantum entanglement in γγ→ tt̅ at polarized photon colliders with NLO QCD corrections",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:50Z",
  "url": "https://research.draconitic.com/paper/875ryd1a5tr3w",
  "venue": "arXiv",
  "versions": []
}