Quantum gravity corrections and entropy at the Planck time
Date
2016-01-19
Authors
Basilakos, Spyros
Das, Saurya
Vagenas, Elias C.
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Abstract
We investigate the effects of Quantum Gravity on the Planck era of the universe. In particular,
using different versions of the Generalized Uncertainty Principle and under specific conditions we find
that the main Planck quantities such as the Planck time, length, mass and energy become larger by
a factor of order 10−104 compared to those quantities which result from the Heisenberg Uncertainty
Principle. However, we prove that the dimensionless entropy enclosed in the cosmological horizon
at the Planck time remains unchanged. These results, though preliminary, indicate that we should
anticipate modifications in the set-up of cosmology since changes in the Planck era will be inherited
even to the late universe through the framework of Quantum Gravity (or Quantum Field Theory)
which utilizes the Planck scale as a fundamental one. More importantly, these corrections will not
affect the entropic content of the universe at the Planck time which is a crucial element for one of
the basic principles of Quantum Gravity named Holographic Principle.
Description
Sherpa Romeo green journal. “This is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Cosmology and Astroparticle Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it.”
Keywords
Quantum gravity , Planck , Generalized uncertainty principle , GUP , Heisenberg uncertainty principle , HUP , Quantum gravity phenomenology , Quantum cosmology
Citation
Basilakos, S., Das., S., & Vagenas, E. C. (2010). Quantum gravity corrections and entropy at the Planck time. Journal of Cosmology and Astroparticle Physics, 2010(09), 027. https://doi.org/10.1088/1475-7516/2010/09/027