The Effective Field Theory of nonsingular cosmology
Sign Up to like & getrecommendations! Published in 2017 at "Journal of High Energy Physics"
DOI: 10.1007/jhep01(2017)090
Abstract: A bstractIn this paper, we explore the nonsingular cosmology within the framework of the Effective Field Theory (EFT) of cosmological perturbations. Due to the recently proved no-go theorem, any nonsingular cosmological models based on the… read more here.
Keywords: effective field; cosmology; field theory; nonsingular cosmology ... See more keywords
R(D(∗)) from W′ and right-handed neutrinos
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DOI: 10.1007/jhep09(2018)169
Abstract: A bstractWe provide an ultraviolet (UV) complete model for the R(D(∗)) anomalies, in which the additional contribution to semi-tauonic b → c transitions arises from decay to a right-handed sterile neutrino via exchange of a… read more here.
Keywords: cosmology; physics; model; right handed ... See more keywords
Kerr-NUT-de Sitter as an inhomogeneous non-singular bouncing cosmology
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DOI: 10.1007/jhep09(2019)096
Abstract: Abstract We present exact non-singular bounce solutions of general relativity in the presence of a positive cosmological constant and an electromagnetic field, without any exotic matter. The solutions are distinguished by being spatially inhomogeneous in… read more here.
Keywords: sitter inhomogeneous; kerr nut; nut sitter; inhomogeneous non ... See more keywords
Islands in multiverse models
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DOI: 10.1007/jhep11(2021)212
Abstract: Abstract We consider multiverse models in two-dimensional linear dilaton-gravity theories as toy models of false vacuum eternal inflation. Coupling conformal matter we calculate the Von Neumann entropy of subregions. When these are sufficiently large we… read more here.
Keywords: multiverse models; islands multiverse; cosmology;
Holographic cosmology from “dimensional reduction” of N = 4 SYM vs. AdS5× S5
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DOI: 10.1007/jhep12(2019)025
Abstract: Abstract We propose a way to obtain holographic cosmology models for 3+1 dimensional cosmologies vs. 3 dimensional field theories from a “dimensional reduction” procedure, obtained by integrating over the time direction, of (modifed) standard holographic… read more here.
Keywords: dimensional reduction; holographic cosmology; cosmology; sym ads5 ... See more keywords
Cosmology as a CFT1
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep12(2019)031
Abstract: Abstract We show that the simplest FLRW cosmological system consisting in the homo- geneous and isotropic massless Einstein-Scalar system enjoys a hidden conformal symmetry under the 1D conformal group SL(2, ℝ) acting as Mobius transformations… read more here.
Keywords: cosmology; cosmology cft1;
An interacting new holographic dark energy in the framework of fractal cosmology
Sign Up to like & getrecommendations! Published in 2018 at "Astrophysics and Space Science"
DOI: 10.1007/s10509-018-3454-3
Abstract: In this paper, we study an interacting holographic dark energy model in the framework of fractal cosmology. The features of fractal cosmology could pass ultraviolet divergencies and also make a better understanding of the universe… read more here.
Keywords: cosmology; model; dark energy; holographic dark ... See more keywords
What justifies the existence of a cosmological horizon?
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DOI: 10.1007/s10509-019-3718-6
Abstract: The Black hole cosmology is a cosmological model in which the observable universe is the interior of a black hole. When this cosmology was proposed, it was unknown that the expansion of the universe is… read more here.
Keywords: cosmology; cosmological horizon; hole cosmology; black hole ... See more keywords
Linear expansion models vs. standard cosmologies: a critical and historical overview
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DOI: 10.1007/s10509-019-3720-z
Abstract: Numerous linear expansion cosmological models are critically revised and compared with standard cosmologies from a historical perspective. There are two major classes of such models: those strictly linear along the expansion history (coasting) and those… read more here.
Keywords: standard cosmologies; expansion; cosmology; expansion models ... See more keywords
The Effect of Neutrino Mass in Cosmology
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DOI: 10.1007/s10511-019-09568-5
Abstract: The influence of the small neutrino mass on the properties of the cosmological neutrino gas and on the evolution of the universe is estimated. The characteristics of the equilibrium neutrino gas are first calculated and… read more here.
Keywords: effect neutrino; cosmology; neutrino; neutrino mass ... See more keywords
The Big Bang and its Dark-Matter Content: Whence, Whither, and Wherefore
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DOI: 10.1007/s10701-018-0162-3
Abstract: The singularity theorems of the 1960s showed that Lemaître’s initial symmetry assumptions were not essential for deriving a big-bang origin for a vast multitude of relativistic universe models. Yet the actual universe accords remarkably closely… read more here.
Keywords: big bang; cosmology; dark matter; bang dark ... See more keywords