{
  "abstract": "Recent cosmological results, including the persistent $H_0$ tension and indications of dynamical dark energy, have raised the possibility that the standard $Λ$-Cold Dark Matter ($Λ$CDM) model may be incomplete. At the same time, theoretical developments based on swampland conjectures indicate that the realization of a stable de Sitter vacuum within string theory is challenging. Motivated by these observational and theoretical considerations, we investigate an interacting $Λ$ scenario characterized by a general linear coupling in the dark sector. At the background level, this model naturally allows the dark energy density to evolve from negative to positive values, opening the possibility of a transition from an anti-de Sitter-like phase to the de Sitter-like phase inferred by current observations. We derive the analytic background solutions and perturbation equations, discuss the physically acceptable region of parameter space, and constrain the model with DES-Dovekie type Ia supernovae, DESI BAO and CMB data. Our analysis suggests a parameter space allowing the dark energy density to change sign while maintaining positive dark matter density, motivating further investigation of an interaction-driven anti-de Sitter to de Sitter transition.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.38422",
  "author_total": 5,
  "authors": [
    {
      "name": "Yifei Zhao"
    },
    {
      "name": "Jailson Alcaniz"
    },
    {
      "name": "Humberto A. Borges"
    },
    {
      "name": "Saulo Carneiro"
    },
    {
      "name": "Rodrigo von Marttens"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f6gvpdfkb4dej.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.38422",
  "fulltext_url": null,
  "id": "f6gvpdfkb4dej",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.38422",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7215089223",
  "pdf_url": "https://arxiv.org/pdf/2609.38422",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f6gvpdfkb4dej.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:48Z",
      "native_id": "2609.38422",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.38422"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "AdS - de Sitter transition in interacting dark energy models",
  "title_text": "AdS - de Sitter transition in interacting dark energy models",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:48Z",
  "url": "https://research.draconitic.com/paper/f6gvpdfkb4dej",
  "venue": "arXiv",
  "versions": []
}