Cientistas afirmam ter descoberto o que existia antes do início do universo

sábado, outubro 15, 2016

Non-singular and Cyclic Universe from the Modified GUP

Source/Fonte: Physics-Astronomy
In this paper, we investigate the effects of a new version of the generalized uncertainty principle (modified GUP) on the dynamics of the Universe. As the modified GUP will modify the relation between the entropy and area of the apparent horizon, it will also deform the Friedmann equations within Jacobson's approach. We explicitly find these deformed Friedmann equations governing the modified GUP-corrected dynamics of such a Universe. It is shown that the modified GUP-deformed Jacobson's approach implies an upper bound for the density of such a Universe. The Big Bang singularity can therefore also be avoided using the modified GUP-corrections to horizons' thermodynamics. In fact, we are able to analyze the pre Big Bang state of the Universe. Furthermore, the equations imply that the expansion of the Universe will come to a halt and then will immediately be followed by a contracting phase. When the equations are extrapolated beyond the maximum rate of contraction, a cyclic Universe scenario emerges.
Comments:22 pages, 2 figures
Subjects:General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
Cite as:arXiv:1608.00560 [gr-qc]
 (or arXiv:1608.00560v2 [gr-qc] for this version)

Submission history

From: Fayçal Hammad [view email] 
[v1] Sat, 30 Jul 2016 03:40:35 GMT (429kb,D)
[v2] Wed, 3 Aug 2016 02:22:05 GMT (429kb,D)