{
  "abstract": "We explore theoretically the formation and evolution of spatiotemporal vortex bullets, pulses confined in both space and time while carrying orbital angular momentum, inside a graded-index multimode fiber. Through a two-fold approach, combining variational analysis with full numerical simulations, we establish the existence of a bistable vortex soliton family, characterized by distinct radial and azimuthal quantum numbers. These wave packets exhibit a Laguerre-Gaussian multi-ring topology in their spatiotemporal structure. We identify the experimental conditions necessary for the generation of such structured states of light. A stability analysis based on Vakhitov-Kolokolov criteria reveals an upper limit for the propagation constant, below which vortex bullets are found to be stable. Stationary and non-stationary dynamics of vortex bullets with different topological charges are analyzed fully, exploiting analytical techniques that are supported by full numerical simulations. These results enhance our understanding of self-trapped, spatiotemporal vortex solitons in a graded-index medium and may lead to potential applications in the area of classical and quantum information processing.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.30732",
  "author_total": 4,
  "authors": [
    {
      "name": "Ashis Paul"
    },
    {
      "name": "Anuj P. Lara"
    },
    {
      "name": "Govind P. Agrawal"
    },
    {
      "name": "Samudra Roy"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/eqzdpjf03x2td.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.30732",
  "fulltext_url": null,
  "id": "eqzdpjf03x2td",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.30732",
  "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",
      "nlin.PS"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "3109|Nonlinear Photonic Systems"
    ]
  ],
  "openalex": "W7204964323",
  "pdf_url": "https://arxiv.org/pdf/2608.30732",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-31",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/eqzdpjf03x2td.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "2608.30732",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.30732"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:nlin.PS",
      "subfield": "statistical-nonlinear"
    }
  ],
  "title": "Robust bistable vortex light bullets in graded-index multimode fibers",
  "title_text": "Robust bistable vortex light bullets in graded-index multimode fibers",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:41Z",
  "url": "https://research.draconitic.com/paper/eqzdpjf03x2td",
  "venue": "arXiv",
  "versions": []
}