{
  "abstract": "We construct a compensator-free $\\mathcal N=2$ superconformal and electric--magnetic duality-invariant extension of ModMax electrodynamics in ordinary flat superspace. The action is built entirely from the Abelian vector multiplet, using a derivative composite of its field strength, and the self-duality equation is solved to all orders as a formal series in the coupling. Upon setting the additional $\\mathcal N=1$ chiral multiplet to zero, the action is equivalent off shell to the $\\mathcal N=1$ ModMax action of Bandos, Lechner, Sorokin and Townsend through a local vector-prepotential redefinition. Since the complex scalar of the $\\mathcal N=2$ multiplet is set to zero in this reduction, we add one superconformal interaction that leaves the reduction unchanged and is chosen to ensure causal scalar propagation. On constant non-null electromagnetic backgrounds with vanishing scalar expectation value, the higher-order scalar coefficients are fixed by requiring the scalar quadratic action to satisfy the stress-tensor square-root flow, modulo equations of motion and a total derivative. We determine the quadratic action of the full multiplet on these backgrounds to all orders. Its analytic continuation to finite $γ\\geq0$ gives causal scalar propagation, with transverse speed squared $e^{-γ}$ and unit longitudinal speed, the ModMax photon cones, luminal gauginos with positive kinetic coefficients, and auxiliary fields with algebraic equations of motion.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.23447",
  "author_total": 1,
  "authors": [
    {
      "name": "Ariunzul Davgadorj"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0s4mrjtbms62f.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.23447",
  "fulltext_url": null,
  "id": "0s4mrjtbms62f",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.23447",
  "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-th"
    ],
    [
      "openalex",
      "3106|Black Holes and Theoretical Physics"
    ]
  ],
  "openalex": "W7222960839",
  "pdf_url": "https://arxiv.org/pdf/2610.23447",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0s4mrjtbms62f.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2610.23447",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.23447"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Compensator-free $\\mathcal N=2$ extension of ModMax and scalar propagation",
  "title_text": "Compensator-free 𝒩=2 extension of ModMax and scalar propagation",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:21Z",
  "url": "https://research.draconitic.com/paper/0s4mrjtbms62f",
  "venue": "arXiv",
  "versions": []
}