{
  "abstract": "Building on the Bethe ansatz and generalized hydrodynamics, we rigorously establish universal relations between Drude weights governing charge, spin, and energy transport and thermodynamic properties for the one-dimensional repulsive two-component continuum Fermi gas - the paradigmatic integrable Yang-Gaudin model. We analytically derive thermodynamic expressions for charge Drude weights: $D_{nn}$, $D_{nm}$, $D_{ne}$ (responses of particle, magnetization and energy currents to a chemical potential gradient) equal the particle density, magnetization, and temperature times entropy density, respectively. These relations constitute a hallmark of ballistic transport, and can be generalized to other 1D continuum integrable systems. Furthermore, we investigate spin Drude weight ($D_{mm}$, $D_{me}$) at zero and low temperatures. They characterize the magnetization and energy current responses to a magnetic field gradient, revealing an essential spin-charge coupling feature in quantum transport. We find that the Drude weights $D_{nm}$, $D_{mm}$, and $D_{me}$ across the $μ\\text{-}H$ plane remarkably map out the zero-temperature phase boundary. This work fills a critical gap in the understanding of transport within integrable quantum gases and furnishes a direct theoretical foundation for future ultracold-atom experiments.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.11137",
  "author_total": 6,
  "authors": [
    {
      "name": "Xiangguo Yin"
    },
    {
      "name": "Dawei Niu"
    },
    {
      "name": "Shuang Zhang"
    },
    {
      "name": "Shizhong Zhang"
    },
    {
      "name": "Yunbo Zhang"
    },
    {
      "name": "Xi-Wen Guan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2vjv9ngr3jsmd.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.11137",
  "fulltext_url": null,
  "id": "2vjv9ngr3jsmd",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.11137",
  "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",
      "3107|Cold Atom Physics and Bose-Einstein Condensates"
    ]
  ],
  "openalex": "W7221158670",
  "pdf_url": "https://arxiv.org/pdf/2610.11137",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2vjv9ngr3jsmd.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:54Z",
      "native_id": "2610.11137",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.11137"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Universal Drude Weights in One-dimensional Repulsive Fermi Gas",
  "title_text": "Universal Drude Weights in One-dimensional Repulsive Fermi Gas",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:54Z",
  "url": "https://research.draconitic.com/paper/2vjv9ngr3jsmd",
  "venue": "arXiv",
  "versions": []
}