Results 41 to 50 of about 1,773 (231)
Inflation and precision cosmology [PDF]
Brazilian Journal of Physics, 2004 A brief review of inflation is presented. After having demonstrated the generality of the inflationary mechanism, the emphasize is put on its simplest realization, namely the single field slow-roll inflationary scenario. Then, it is shown how, concretely, one can calculate the predictions of a given model of inflation.
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Novel vacuum conditions in inflationary collapse models
Physics Letters B, 2017 Within the framework of inflationary models that incorporate a spontaneous reduction of the wave function for the emergence of the seeds of cosmic structure, we study the effects on the primordial scalar power spectrum by choosing a novel initial quantum
Gabriel R. Bengochea, Gabriel León
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Towards geometric inflation: The cubic case
Physics Letters B, 2020 We present an up to cubic curvature correction to General Relativity with the following features: (i) its vacuum spectrum solely consists of a graviton, (ii) it possesses well-behaved black hole solutions which coincide with those of Einsteinian cubic ...
Gustavo Arciniega +2 more
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Assisted Inflation in Bianchi VI0 Cosmologies [PDF]
General Relativity and Gravitation, 2002 11 ...
Aguirregabiria, J. M. +2 more
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A new mechanism for freezing extra dimensions with higher-order curvature terms
Physics Letters B, 2020 We construct a model of higher dimensional cosmology in which extra dimensions are frozen by virtue of the cubic-order Lovelock gravity throughout the cosmic history from inflation to the present with radiation and matter-dominated regimes in between.
Hiroaki W.H. Tahara +2 more
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Universe, 2020 We investigate the ability of the exponential power-law inflation to be a phenomenologically correct model of the early universe. We study General Relativity (GR) scalar cosmology equations in Ivanov–Salopek–Bond (or Hamilton–Jacobi like) representation ...
Igor Fomin, Sergey Chervon
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Constant-roll inflation in brane induced gravity cosmology
European Physical Journal C: Particles and Fields, 2022 In this article we study a constant-roll inflationary model in the context of the DGP brane-world cosmology caused by a quintessence scalar field. We determine an analytical solution for the Friedman equation coupled to the equation of motion of the ...
A. Ravanpak, G. F. Fadakar
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Nearly Forgotten Cosmological Concept of E. B. Gliner
Universe, 2023 E. B. Gliner started his scientific career in 1963 at the age of 40. In 1965, when the existence of the cosmological constant λ seemed unnecessary to most cosmologists, he renewed interest in the problem by emphasizing a material interpretation of de ...
Dmitry Yakovlev, Alexander Kaminker
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Cosmology analogues in optical systems [PDF]
EPJ Web of Conferences, 2020 We discuss the possibility of exploiting polariton-exciton physics as an analogue experimental tool to study challenging ideas and existing problems arising in the context of gravity theory and theoretical cosmology.
Howard Eric
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Journal of High Energy Physics, 2021 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 find that
Sergio E. Aguilar-Gutierrez +4 more
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