English

Exponential correction to Friedmann equations

General Relativity and Quantum Cosmology 2024-07-23 v1 High Energy Physics - Theory

Abstract

In this paper, employing the exponential corrected entropy (Chatterjee and Ghosh in Phys Rev Lett 125:041302, 2020), we derive the modified Friedmann equations from the first law of thermodynamics at apparent horizon and Verlinde's entropic gravity scenario. First, we derive the modified Friedmann equations from the first law of thermodynamics. We investigate the validity of generalised second law (GSL) of thermodynamics and find that it is always satisfied for the all eras of universe. Moreover, we investigate the deceleration parameter for the case k=0k=0 in two frameworks. Finally, we numerically study the bouncing behaviour for the modified Friedmann equations obtained from entropic gravity. The results indicate that the bouncing behaviour is possible for the cases k=1k=1 and k=1k=-1.

Keywords

Cite

@article{arxiv.2407.14685,
  title  = {Exponential correction to Friedmann equations},
  author = {Özgür Ökcü and Ekrem Aydiner},
  journal= {arXiv preprint arXiv:2407.14685},
  year   = {2024}
}

Comments

20 pages, 2 figures, 4 tables

R2 v1 2026-06-28T17:47:58.600Z