General Relativity and Gravitation

, Volume 45, Issue 6, pp 1227–1246

Effects of quantum gravity on the inflationary parameters and thermodynamics of the early universe

Research Article

DOI: 10.1007/s10714-013-1522-0

Cite this article as:
Tawfik, A., Magdy, H. & Farag Ali, A. Gen Relativ Gravit (2013) 45: 1227. doi:10.1007/s10714-013-1522-0


The effects of generalized uncertainty principle (GUP) on the inflationary dynamics and the thermodynamics of the early universe are studied. Using the GUP approach, the tensorial and scalar density fluctuations in the inflation era are evaluated and compared with the standard case. We find a good agreement with the Wilkinson Microwave Anisotropy Probe data. Assuming that a quantum gas of scalar particles is confined within a thin layer near the apparent horizon of the Friedmann-Lemaitre-Robertson-Walker universe which satisfies the boundary condition, the number and entropy densities and the free energy arising form the quantum states are calculated using the GUP approach. A qualitative estimation for effects of the quantum gravity on all these thermodynamic quantities is introduced.


InflationQuantum gravity phenomenology

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Egyptian Center for Theoretical Physics (ECTP)MTI UniversityCairoEgypt
  2. 2.Research Center for Einstein PhysicsFreie-University BerlinBerlinGermany
  3. 3.Physics Department, Faculty of ScienceBenha UniversityBenhaEgypt