Zobrazeno 1 - 10
of 198
pro vyhledávání: '"Tavakol, Reza"'
Autor:
Tavakol, Reza, Gironi, Fabio
Infinity, in various guises, has been invoked recently in order to `explain' a number of important questions regarding observable phenomena in science, and in particular in cosmology. Such explanations are by their nature speculative. Here we introdu
Externí odkaz:
http://arxiv.org/abs/1604.06773
Publikováno v:
In Perioperative Care and Operating Room Management September 2021 24
Autor:
Tavakol, Reza, Anderson, Edward
We argue against current proposals concerning the non-existence of time. We point out that a large number of these proposals rely, at least implicitly, on the assumption of `closure' (or `partial closure') of the laws of Physics. I.e. the assumption
Externí odkaz:
http://arxiv.org/abs/1506.07928
Publikováno v:
JCAP 11(2013)010
We study the effects of inhomogeneities on the evolution of the Universe, by considering a range of cosmological models with discretized matter content. This is done using exact and fully relativistic methods that exploit the symmetries in and about
Externí odkaz:
http://arxiv.org/abs/1309.2876
Publikováno v:
Phys.Rev. D88 (2013) 063533
Planck data has not found the 'smoking gun' of non-Gaussianity that would have necessitated consideration of inflationary models beyond the simplest canonical single field scenarios. This raises the important question of what these results do imply f
Externí odkaz:
http://arxiv.org/abs/1307.7095
Publikováno v:
Class. Quant. Grav. 30 (2013) 125009
We propose a thermodynamically motivated measure of gravitational entropy based on the Bel-Robinson tensor, which has a natural interpretation as the effective super-energy-momentum tensor of free gravitational fields. The specific form of this measu
Externí odkaz:
http://arxiv.org/abs/1303.5612
Publikováno v:
JCAP 1211 (2012) 060
We compute the covariant three-point function near horizon-crossing for a system of slowly-rolling scalar fields during an inflationary epoch, allowing for an arbitrary field-space metric. We show explicitly how to compute its subsequent evolution us
Externí odkaz:
http://arxiv.org/abs/1208.6011
Publikováno v:
JCAP 1209 (2012) 001
We calculate the conditions required to produce a large local trispectrum during two-field slow-roll inflation. This is done by extending and simplifying the 'heatmap' approach developed by Byrnes et al. The conditions required to generate a large tr
Externí odkaz:
http://arxiv.org/abs/1203.6844
Publikováno v:
Phys. Rev. D 86, 043506 (2012)
An important open question in cosmology is the degree to which the Friedmann-Lemaitre-Robertson-Walker (FLRW) solutions of Einstein's equations are able to model the large-scale behaviour of the locally inhomogeneous observable universe. We investiga
Externí odkaz:
http://arxiv.org/abs/1203.6478
Publikováno v:
Int.J.Mod.Phys. A26 (2011) 3821-3832
We study the evolution of non-Gaussianity in multiple-field inflationary models, focusing on three fundamental questions: (a) How is the sign and peak magnitude of the non-linearity parameter fNL related to generic features in the inflationary potent
Externí odkaz:
http://arxiv.org/abs/1107.2270