{
  "abstract": "Vector-vortex photons, characterized by a nonseparable coupling between polarization and orbital angular momentum (OAM), offer opportunities for optical manipulation, quantum communication, nuclear photonics, etc. However, their generation in the $γ$-ray regime remains challenging. Here, we put forward a novel method to generate vector-vortex $γ$ photons via nonlinear Compton scattering in elliptically polarized laser pulses. We reveal that tailoring laser ellipticity directs the multiphoton absorption to coherently populate OAM modes with opposite winding numbers, $\\pm \\ell$, tied to orthogonal circular polarizations, producing nonseparable spin-OAM photon states. For a linearly polarized laser of moderate intensity (dimensionless amplitude $a_0 \\sim 1$), the mode-pair concurrence--a 0-to-1 measure of spin-OAM entanglement--reaches unity for MeV $γ$ photons, realizing maximally nonseparable radial- or azimuthal-type vector-vortex states. The laser amplitude further controls the accessible OAM spectrum. Our method offers a route to MeV vector-vortex photons, opening a new avenue for nuclear-scale structured photonics and high-energy quantum information.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.35208",
  "author_total": 11,
  "authors": [
    {
      "name": "Yong-Zheng Ren"
    },
    {
      "name": "Mamutjan Ababekri"
    },
    {
      "name": "Jun-Lin Zhou"
    },
    {
      "name": "Feng Wan"
    },
    {
      "name": "Qian Zhao"
    },
    {
      "name": "Zhong-Peng Li"
    },
    {
      "name": "Kun Xue"
    },
    {
      "name": "Ya-Qing Huang"
    },
    {
      "name": "Zhao-Hui Chen"
    },
    {
      "name": "Zhong-Feng Xu"
    },
    {
      "name": "Jian-Xing Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2fcptdpdhbbk5.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.35208",
  "fulltext_url": null,
  "id": "2fcptdpdhbbk5",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.35208",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Orbital Angular Momentum in Optics"
    ]
  ],
  "openalex": "W7214797329",
  "pdf_url": "https://arxiv.org/pdf/2609.35208",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2fcptdpdhbbk5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.35208",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.35208"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Generating Vector-Vortex $γ$ Photons by Nonlinear Compton Scattering",
  "title_text": "Generating Vector-Vortex γ Photons by Nonlinear Compton Scattering",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/2fcptdpdhbbk5",
  "venue": "arXiv",
  "versions": []
}