{
  "abstract": "Carrier-envelope-phase (CEP) stabilized few-cycle pulses make the sub-cycle field structure a control parameter for laser-driven polarized electron sources, yet spin solvers for such pulses are rarely tested against exact results. We show that for an electron initially at rest in a linearly polarized plane-wave pulse the rest-frame polarization angle follows the instantaneous vector potential, $Σ= 2\\arctan(a_x/2) + a_e a_x$ with $a_e$ the electron anomaly: the net rotation vanishes for every CEP, while the peak intra-pulse angle varies over the CEP by 3.02 degrees for a two-cycle and by 0.22 degrees for an eight-cycle pulse. The result follows from the Volkov orbit in longitudinal and transverse rapidities. We use it to validate a light-front reference integrator and a physics-informed neural network trained only on the light-front equations, which reaches $4\\times10^{-5}$ in the spin sector and carries over to elliptical polarization, for which no closed-form solution is known. This gives validated tools for CEP-resolved spin dynamics in intense fields.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.19756",
  "author_total": 4,
  "authors": [
    {
      "name": "N. S. Akintsov"
    },
    {
      "name": "A. P. Nevecheria"
    },
    {
      "name": "S. N. Andreev"
    },
    {
      "name": "Qing-Hua Qin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0yvh1nrtph5me.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.19756",
  "fulltext_url": null,
  "id": "0yvh1nrtph5me",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.19756",
  "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",
      "physics.optics"
    ],
    [
      "arxiv",
      "physics.plasm-ph"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Laser-Matter Interactions and Applications"
    ]
  ],
  "openalex": "W7213588096",
  "pdf_url": "https://arxiv.org/pdf/2609.19756",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0yvh1nrtph5me.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2609.19756",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.19756"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Rapidity-Coupled Spin Dynamics in Pulsed Laser Fields from Physics-Informed Neural Networks",
  "title_text": "Rapidity-Coupled Spin Dynamics in Pulsed Laser Fields from Physics-Informed Neural Networks",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/0yvh1nrtph5me",
  "venue": "arXiv",
  "versions": []
}