{
  "abstract": "We investigate the cosmological dynamics of the nonlinear $σ$-model in a locally rotational symmetric Bianchi V background geometry. We employ the $SU(2)$ and the $SL(2,\\mathbb{R})$ internal symmetries, for which the kinetic metric of the multi-scalar fields is a space of constant curvature. We assume an inhomogeneous ansatz for the scalar fields, such that the $σ$-model, which allows the existence of nontrivial solutions in the Bianchi V geometry. For an exponential potential, we perform a detailed analysis of the phase space, we determine the stationary points, and we study their stability properties. The scalar field inhomogeneities prevent both the slow-roll and hyperbolic inflationary epochs. The existence of a cosmological constant is required to describe cosmic acceleration.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.09049",
  "author_total": 5,
  "authors": [
    {
      "name": "N. Dimakis"
    },
    {
      "name": "A. Giacomini"
    },
    {
      "name": "G. Leon"
    },
    {
      "name": "F. Moncada"
    },
    {
      "name": "A. Paliathanasis"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3hw3x36fggrwq.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.09049",
  "fulltext_url": null,
  "id": "3hw3x36fggrwq",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.09049",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7221024294",
  "pdf_url": "https://arxiv.org/pdf/2610.09049",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3hw3x36fggrwq.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:37Z",
      "native_id": "2610.09049",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.09049"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Anisotropic Cosmology with Inhomogeneous $SU(2) $ and $SL(2,\\mathbb{R})$ Nonlinear $σ$-Models",
  "title_text": "Anisotropic Cosmology with Inhomogeneous $SU(2) $ and SL(2,ℝ) Nonlinear σ-Models",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:37Z",
  "url": "https://research.draconitic.com/paper/3hw3x36fggrwq",
  "venue": "arXiv",
  "versions": []
}