{
  "abstract": "Flavor-current correlators are studied in strongly-coupled dense (holographic) matter, at finite quark chemical potential $μ_q$ and finite isospin asymmetry. The non-Abelian hydrodynamic description of the charged currents is derived in the presence of an isospin chemical potential $μ_3$. The two-point correlators of charged currents are then computed holographically at finite quark and isospin chemical potentials. In the near-extremal hydrodynamic regime, $ω, k, T, μ_3 \\ll μ\\equiv \\sqrt{μ_q^2+μ_3^2}$, relevant for cold strongly coupled matter, the IR properties of the correlators are studied. It is shown that in this regime, the correlators agree with the non-Abelian hydrodynamic predictions. Therefore, the traditional regime of validity of standard hydrodynamics extends beyond $ω, k \\ll T \\ll μ$ to the so-called extended hydrodynamic regime $T\\ll ω, k \\ll μ$. The holographic product formula is applied to the present non-Abelian system, and is used to propose an extended hydrodynamic approximation capturing both hydrodynamic-like poles and the leading effect of AdS$_2$ poles, by resumming the low-$ω$ logarithms. The results are verified through a detailed numerical analysis of the exact correlators and quasi-normal mode spectrum.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.20991",
  "author_total": 6,
  "authors": [
    {
      "name": "Thomas Apostolidis"
    },
    {
      "name": "Matti Järvinen"
    },
    {
      "name": "Elias Kiritsis"
    },
    {
      "name": "Francesco Nitti"
    },
    {
      "name": "Andrea Olzi"
    },
    {
      "name": "Edwan Préau"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d8bmd8qhpdded.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.20991",
  "fulltext_url": null,
  "id": "d8bmd8qhpdded",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.20991",
  "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.stat-mech"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|High-Energy Particle Collisions Research"
    ]
  ],
  "openalex": "W7170810267",
  "pdf_url": "https://arxiv.org/pdf/2607.20991",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d8bmd8qhpdded.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2607.20991",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.20991"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.stat-mech",
      "subfield": "statistical-nonlinear"
    }
  ],
  "title": "Flavour current correlators and the non-Abelian hydrodynamic approximation: the charged sector",
  "title_text": "Flavour current correlators and the non-Abelian hydrodynamic approximation: the charged sector",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/d8bmd8qhpdded",
  "venue": "arXiv",
  "versions": []
}