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Dark energy models through nonextensive Tsallis' statistics

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arxiv 1403.5706 v1 pith:7PDAGLNV submitted 2014-03-22 gr-qc

Dark energy models through nonextensive Tsallis' statistics

Rafael da C. Nunes , Ed\'esio M. Barboza Jr. , Everton M. C. Abreu , Jorge Ananias Neto This is my paper
classification gr-qc
keywords darkenergymodelsnonextensivetsallisacceleratedbarboza-alcanizcalled
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The accelerated expansion of the Universe is one of the greatest challenges of modern physics. One candidate to explain this phenomenon is a new field called dark energy. In this work we have used the Tsallis nonextensive statistical formulation of the Friedmann equation to explore the Barboza-Alcaniz and Chevalier-Polarski-Linder parametric dark energy models and the Wang-Meng and Dalal vacuum decay models. After that, we have discussed the observational tests and the constraints concerning the Tsallis nonextensive parameter.

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  1. Cosmological consequences of scale-dependent Barrow-Tsallis entropy

    gr-qc 2026-07 conditional novelty 6.0

    A scale-dependent Barrow-Tsallis entropy cosmology fits cosmic data but is statistically disfavored versus ΛCDM, with only a modest and partially circular Hubble-tension 'alleviation'.