Dark Energy Problem, Physics of Early Universe and Some New Approaches in Gravity

Alexander Shalyt-Margolin

doi:10.3390/e14112143

Abstract

The dark energy problem is studied based on the approach associated with the cosmological term in General Relativity that is considered as a dynamic quantity. It is shown that a quantum field theory of the Early Universe (Planck scales) and its limiting transition at low energy play a significant role. Connection of this problem with Verlinde’s new (entropic) approach to gravity is revealed within the frame of such statement as well as the Generalized Uncertainty Principle (GUP) and Extended Uncertainty Principle (EUP). The implications from the obtained results are presented, and a more rigorous statement of the Concordance Problem in cosmology is treated.

Highlights

At the present time the fact that the Dark Energy problem is basic for the fundamental physics is no longer a subject of much controversy
In the last decade numerous works devoted to a Quantum Field Theory (QFT) at Planck’s scale [35,36,37,38,39,40,41] have been published
This interest stems from the facts that (i) at these scales it is expected to reveal the effects of a Quantum Gravity (QG), and this still unresolved theory is intriguing all the researchers engaged in the field of theoretical physics; (ii) modern accelerators, in particular LHC, have the capacity of achieving the energies at which some QG effects may be exhibited

Summary

Introduction

At the present time the fact that the Dark Energy problem is basic for the fundamental physics is no longer a subject of much controversy. In the last decade numerous works devoted to a Quantum Field Theory (QFT) at Planck’s scale [35,36,37,38,39,40,41] have been published (the author has no pretensions of being exhaustive in his references) This interest stems from the facts that (i) at these scales it is expected to reveal the effects of a Quantum Gravity (QG), and this still unresolved theory is intriguing all the researchers engaged in the field of theoretical physics; (ii) modern accelerators, in particular LHC, have the capacity of achieving the energies at which some QG effects may be exhibited. As indicated by the title, in this work the above-mentioned three lines of research are interrelated

Dark Energy as Dynamical Vacuum Energy

Quantum Theory of Early Universe

Comments and Conclusion