{
  "abstract": "Exact toroidal fluid and kinetic equilibria with nested magnetic surfaces and no continuous symmetry are of great interest in laboratory, astrophysical and space plasmas. Their existence and stability have been open in physics and mathematics for decades. We construct such anisotropic-pressure equilibria by applying the Clemente transformation to exact vacuum fields. They connect smoothly to these fields on a fixed regular domain and preserve a regular magnetic axis, perfectly nested surfaces and spatially varying rotational transform. To our knowledge, the sheared configurations are the first exact anisotropic equilibria combining these properties with positive pressures and a positive firehose margin. The fixed-boundary Chew--Goldberger--Low (CGL) quadratic energy splits into a nonnegative vacuum-field term and a local pressure term, nonnegative for p_perp/p_parallel <= (3+\\sqrt{21})/2 ~ 3.79. For p_parallel >= p_perp each configuration minimizes the finite-amplitude CGL energy over smooth boundary-fixed ideal material deformations. For the current-free configurations, physical guiding-center distributions produce these pressures within the same bound, with no free energy for magnetic-moment-conserving electrostatic perturbations. Trapped particles inherit the vacuum field's second adiabatic invariant at a rescaled magnetic moment, so local closed action contours carry over. The equilibrium code DESC reproduces them from the exact solution. Kinetic stability for surface-dependent rescalings and against general nonlinear electromagnetic perturbations remains open.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.10786",
  "author_total": 4,
  "authors": [
    {
      "name": "A. Bhattacharjee"
    },
    {
      "name": "W. Sengupta"
    },
    {
      "name": "V. N. Duarte"
    },
    {
      "name": "L. Fu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/69b8npchccagf.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.10786",
  "fulltext_url": null,
  "id": "69b8npchccagf",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.10786",
  "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",
      "physics.plasm-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.10786",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/69b8npchccagf.ris",
  "sources": [
    {
      "first_seen": "2026-11-10T06:21:23Z",
      "native_id": "2611.10786",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.10786"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Exact analytic anisotropic three-dimensional equilibria with nested magnetic surfaces, confined drift orbits and without spatial symmetry",
  "title_text": "Exact analytic anisotropic three-dimensional equilibria with nested magnetic surfaces, confined drift orbits and without spatial symmetry",
  "type": "preprint",
  "updated_at": "2026-11-10T06:21:23Z",
  "url": "https://research.draconitic.com/paper/69b8npchccagf",
  "venue": "arXiv",
  "versions": []
}