{
  "abstract": "Motivated by the indications of time-varying dark energy equation of state reported from DESI, we investigate a quintessence model with an exponential potential $V_0 e^{-λϕ/m_{\\mathrm{pl}}}$. We derive an analytical relationship between the current equation of state parameter for the quintessence field and the potential parameter $λ$ required to realize radiation and matter domination. Our results provide a useful analytical relation for inferring the potential parameter $λ$ from the observed current equation of state parameter. Furthermore, based on this framework, we provide a new approximate analytical upper bound on the potential parameter $λ$ for current accelerated expansion. Concretely, we obtain $λ<1.94$ as an approximate analytic estimate by adopting $Ω_{\\phi0}=0.685$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: JCAP 09 (2026) 086",
  "arxiv": "2605.05122",
  "author_total": 2,
  "authors": [
    {
      "name": "Naoto Maki"
    },
    {
      "name": "Kazunori Kohri"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b0dz6ycyfn85p.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.05122",
  "fulltext_url": null,
  "id": "b0dz6ycyfn85p",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.05122",
  "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"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.05122",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b0dz6ycyfn85p.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2605.05122",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.05122"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Exponential Quintessence: Analytic Relationship Between the Current Equation of State Parameter and the Potential Parameter",
  "title_text": "Exponential Quintessence: Analytic Relationship Between the Current Equation of State Parameter and the Potential Parameter",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/b0dz6ycyfn85p",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1088/1475-7516/2026/09/086",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}