Concern Regarding "A Non-Inflationary Solution to the Entropy Problem of Standard Cosmology."
| dc.creator | Shuhmaher, Natalia | |
| dc.date | 2008-03-03 | |
| dc.date | 2009-01-07 | |
| dc.date.accessioned | 2026-07-07T12:25:44Z | |
| dc.date.available | 2026-07-07T12:25:44Z | |
| dc.description | We discuss the entropy and the size/homogeneity/horizon problems in power-law expanding universes with one scale initial conditions. We set the minimal scale $Λ= 10^{25}$ GeV at which a non-inflationary solution is possible and show that the radiation dominated epoch alone technically is not able to explain the issue. An earlier paper on the subject, [1], attempts a multidimensional scenario. We review the scenario of the paper [1] in an effective four dimensional Einstein frame. We find that during contraction of extra dimensions, the residual bulk energy density is important and leads to a scaling solution. The existence of this scaling solution is a new result. We provide a numerical example which demonstrates the evolution of the scale factor and the extra dimensions. In the whole, the validity of the effective field theory calculations at the scale of $Λ= 10^{25}$ GeV is under question and, hence, the final conclusion regarding the possibility of a non-inflationary solution is preliminary. | |
| dc.description | 8 pages, 2 figures, content changed, references added | |
| dc.identifier | https://arxiv.org/abs/0803.0216 | |
| dc.identifier | http://arxiv.org/abs/0803.0216 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/214663 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Concern Regarding "A Non-Inflationary Solution to the Entropy Problem of Standard Cosmology." | |
| dc.type | text |