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Título: | Modified cosmology from the thermodynamics of apparent horizon |
Autor: | Nojiri, Shin'ichi; Odintsov, Sergei D. CSIC ORCID; Paul, Tanmoy | Fecha de publicación: | 2022 | Editor: | Elsevier | Citación: | Physics Letters B 835: 137553 (2022) | Resumen: | In the realm of the Bekenstein-Hawking entropy, the thermodynamics of apparent horizon bridges with the usual FLRW (Friedmann-Lemaître-Robertson-Walker) equation only for a special case where the matter field is given by a perfect fluid having equation of state (EoS) parameter =−1, i.e. p =−ρwith ρand prepresenting the energy density and the pressure of the fluid, respectively. To include the case p =−ρ, we consider the modification of the Bekenstein-Hawking entropy in the present work. In particular, we develop an entropy function that leads to the usual FLRW equations, for a generalEoS of the matter fluid given by p =wρ, directly from the thermodynamics of the apparent horizon. The newly developed entropy acquires a correction over the Bekenstein-Hawking entropy and differs from the known entropies like the Tsallis, Rényi, Barrow, Sharma-Mittal, Kaniadakis, and Loop Quantum Gravity entropies proposed so far. Based on this finding, we examine how the Friedmann equations of the apparent horizon cosmology are accordingly modified if one starts with a general entropy depending on the Bekenstein-Hawking entropy. This results in some interesting cosmological consequences during the early and late stages of the universe | Versión del editor: | https://doi.org/10.1016/j.physletb.2022.137553 | URI: | http://hdl.handle.net/10261/296937 | DOI: | 10.1016/j.physletb.2022.137553 | ISSN: | 0370-2693 |
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