{
  "abstract": "We study phase-controlled transport through a one-dimensional channel of attractively interacting fermions connecting two three-dimensional BCS reservoirs. The competition between channel phase stiffness and pair tunnelling at the two contacts results in the emergence of two $4π$-periodic families of stationary states, characterised by symmetric or asymmetric phase drops at the boundaries. Advancing the reservoir phase difference by $2π$ exchanges these families so that the equilibrium energy remains $2π$ periodic, while the $4π$ periodicity might be attained in a diabatic regime. This structure admits a formal description in terms of two boundary Majorana operators, combining into a nonlocal fermion mode. Renormalization-group analysis shows that quantum fluctuations and phase slips are suppressed in the zero-temperature thermodynamic limit, preserving the branch crossings. The predicted branch exchange, metastable currents, and sweep-rate-dependent switching provide experimentally testable signatures of Majorana-like Josephson branch physics in a gapless interacting channel.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.06693",
  "author_total": 3,
  "authors": [
    {
      "name": "Rory Whelan"
    },
    {
      "name": "Dimitri M. Gangardt"
    },
    {
      "name": "Igor V. Lerner"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cfgtp8bdqddw6.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.06693",
  "fulltext_url": null,
  "id": "cfgtp8bdqddw6",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.06693",
  "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.quant-gas"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.06693",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cfgtp8bdqddw6.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T15:20:56Z",
      "native_id": "2611.06693",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.06693"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Majorana-like Josephson branch structure in one-dimensional transport of cold atoms",
  "title_text": "Majorana-like Josephson branch structure in one-dimensional transport of cold atoms",
  "type": "preprint",
  "updated_at": "2026-11-07T18:20:06Z",
  "url": "https://research.draconitic.com/paper/cfgtp8bdqddw6",
  "venue": "arXiv",
  "versions": []
}