{
  "abstract": "We present a general formalism linking modified entropy functions directly to a modified spacetime metric and, subsequently, to an effective matter sector of entropic origin. In particular, within the framework of general relativity, starting from the first law of black-hole thermodynamics we establish an explicit correspondence between the entropy derivative and the metric function, which naturally leads to an emergent stress-energy tensor representing an anisotropic effective fluid. This backreaction effect of horizon entropy may resolve possible inconsistencies recently identified in black hole physics with modified entropies. As specific examples, we apply this procedure to a wide class of modified entropies, such as Barrow, Tsallis–Cirto, Rényi, Kaniadakis, logarithmic, power-law, loop-quantum-gravity, and exponential modifications, and we derive the associated effective matter sectors, analyzing their physical properties and energy conditions.",
  "abstract_shown": true,
  "affiliations": [
    "Indian Institute of Technology",
    "Central University of Himachal Pradesh",
    "State University of Tetovo",
    "National Observatory of Athens",
    "Universidad Católica del Norte",
    "University of Science and Technology of China"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Ankit Anand",
      "orcid": "0000-0002-8832-3212"
    },
    {
      "affs": [
        1
      ],
      "name": "Sahil Devdutt",
      "orcid": "0009-0002-5887-4520"
    },
    {
      "affs": [
        2
      ],
      "name": "Kimet Jusufi",
      "orcid": "0000-0003-0527-4177"
    },
    {
      "affs": [
        3,
        4,
        5
      ],
      "name": "Emmanuel N. Saridakis",
      "orcid": "0000-0003-1500-0874"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8hhp6fqqw59rt.bib",
  "cited_by": 9,
  "doi": "10.1140/epjc/s10052-026-15768-z",
  "fulltext_url": null,
  "id": "8hhp6fqqw59rt",
  "issns": [
    "1434-6044",
    "1434-6052"
  ],
  "landing_url": "https://doi.org/10.1140/epjc/s10052-026-15768-z",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W4416026912",
  "pdf_url": "https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-15768-z.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-05-17",
  "publisher": "Springer Science+Business Media",
  "ris": "https://research.draconitic.com/paper/8hhp6fqqw59rt.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T13:26:43Z",
      "native_id": "W4416026912",
      "source": "openalex",
      "url": "https://doi.org/10.1140/epjc/s10052-026-15768-z"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Effective matter sectors from modified entropies",
  "title_text": "Effective matter sectors from modified entropies",
  "type": "peer-reviewed",
  "updated_at": "2026-11-05T13:20:43Z",
  "url": "https://research.draconitic.com/paper/8hhp6fqqw59rt",
  "venue": "The European Physical Journal C",
  "versions": []
}