Thermodynamic approach to holographic dark energy and the Rényi entropy

2018/03/31 by H. Moradpour, S. A. Moosavi, I. P. Lobo +3 · 1 citation
Physics and Astronomy · #Apparent horizon #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Entropy (arrow of time) #Formalism (music) #Friedmann–Lemaître–Robertson–Walker metric #Holography #Second law of thermodynamics #Statistical Mechanics and Entropy #physics.gen-ph

paper · pdf · doi:10.1140/epjc/s10052-018-6309-8

published as Eur. Phys. J. C (2018) · Accepted by Eur. Phys. J. C (2018)

openalex created_date 2018/03/29 · openalex publication_date 2018/10/01 · arxiv created 2018/10/05 · arxiv updated 2018/10/18 · openalex updated_date 2026/08/06

Abstract

Using the first law of thermodynamics, we propose a relation between the system entropy (S) and its IR (L) and UV ( Λ ) cutoffs. In addition, applying this relation to the apparent horizon of flat FRW universe, whose entropy meets the Rényi entropy, a new holographic dark energy model is addressed. Thereinafter, the evolution of the flat FRW universe, filled by a pressureless source and the obtained dark energy candidate, is studied. In our model, there is no mutual interaction between the cosmos sectors. We find out that the obtained model is theoretically powerful to explain the current accelerated phase of the universe. This result emphasizes that the generalized entropy formalism is suitable for describing systems including the long-range interactions such as gravity.

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• Comparing the holographic principle inspired dark energy models