{
  "abstract": "We investigate Josephson transport through a finite normal segment connecting two Kitaev-ladder superconductors and show that discrete-level detuning controls the sign of the equilibrium Josephson coupling through a branch-selection mechanism. Away from resonance, detuning separates two competing low-energy branches, allowing inter-leg hybridization to clamp the $0$-phase-favoring branch while leaving the $π$-favoring branch dispersive. The resulting negative first harmonic evolves from a branch-switching response at weak coupling into a smooth $π$-junction regime. At resonance the two clamping thresholds coincide, so the finite interval in which only one branch remains dispersive disappears. Once the inter-leg coupling exceeds the resonant clamping threshold, both low-energy branches become independent of the Josephson phase. The remaining finite-energy states then generate a $0$-type Josephson coupling. At $ϕ=π$, the helicity decomposition yields an exact clamping identity for arbitrary finite normal-segment length. Within the controlled sweet-point finite-segment theory, serial propagation fixes the off-resonant fourth-order harmonic to be negative, whereas an isolated resonance leaves a positive residual harmonic within the resonant clamping regime. Numerical calculations demonstrate that the resonance-induced suppression persists away from the solvable phase choice. Thus normal-level resonance does not merely enhance Josephson transmission; it changes which low-energy branches contribute to the Josephson coupling.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.23875",
  "author_total": 3,
  "authors": [
    {
      "name": "Cheng-Rong Xie"
    },
    {
      "name": "Hiroki Tsuchiura"
    },
    {
      "name": "Yukio Tanaka"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1h8ee4ww97zfr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.23875",
  "fulltext_url": null,
  "id": "1h8ee4ww97zfr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.23875",
  "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",
      "cond-mat.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7223018301",
  "pdf_url": "https://arxiv.org/pdf/2610.23875",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1h8ee4ww97zfr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2610.23875",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.23875"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.supr-con",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Resonant suppression of the $π$-type Josephson component in a Kitaev-ladder junction",
  "title_text": "Resonant suppression of the π-type Josephson component in a Kitaev-ladder junction",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:50Z",
  "url": "https://research.draconitic.com/paper/1h8ee4ww97zfr",
  "venue": "arXiv",
  "versions": []
}