Results 21 to 30 of about 32,194 (214)

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, José D. Edelstein, Luisa G. Jaime   +2 more
doaj   +1 more source

Entropic Inflation in Presence of Scalar Field

Universe, 2023
In spirit of the recently proposed four-parameter generalized entropy of apparent horizon, we investigate inflationary cosmology where the matter field inside of the horizon is dominated by a scalar field with a power law potential (i.e., the form of ϕn ...
Sergei D. Odintsov, Simone D’Onofrio, Tanmoy Paul   +2 more
doaj   +1 more source

On the emergence of a classical isotropic universe from a quantum f(R) Bianchi cosmology in the Jordan frame

European Physical Journal C: Particles and Fields, 2023
We demonstrate a spontaneous tendency of quantum wave packets to become quasi-classical, providing a classical limit for the Universe dynamics. However, this limit is not maintained in the future (after a critical value of the relational time) and a ...
Mariaveronica De Angelis, Giovanni Montani   +1 more
doaj   +1 more source

Looking inside the Swampland from Warm Inflation: Dissipative Effects in De Sitter Expansion

Universe, 2023
This paper reviews the theoretical and phenomenological implications of the swampland conjectures from the perspective of inflationary cosmology, focusing on warm inflation.
Arjun Berera, Jaime Calderón-Figueroa
doaj   +1 more source

On the initial singularity and extendibility of flat quasi-de Sitter spacetimes

Journal of High Energy Physics, 2023
Inflationary spacetimes have been argued to be past geodesically incomplete in many situations. However, whether the geodesic incompleteness implies the existence of an initial spacetime curvature singularity or whether the spacetime may be extended ...
Ghazal Geshnizjani, Eric Ling, Jerome Quintin   +2 more
doaj   +1 more source

Inflation [PDF]

, 2001
Inflationary cosmology is reviewed.
Tkachev, I. I.
core   +2 more sources

Inflationary Cosmology in RS-I [PDF]

, 2005
In this work, I intend to show a possible candidate of inflaton potential $V(\phi)$ in a scenario of a brane world defined by a pair of branes (RS-I).Comment: 2 pages, 2 figures, 100 years of relativity international conference on classical and quantum
Figueiró, Michele Ferraz
core   +2 more sources

Testing time-delayed cosmology

European Physical Journal C: Particles and Fields, 2022
Inspired by nonlocal gravity theories, time-delayed cosmology proposes a delayed Friedmann equation that generically predicts an inflationary period with a natural end.
C. J. Palpal-latoc, Reginald Christian Bernardo, Ian Vega   +2 more
doaj   +1 more source

Inflationary Cosmology: Theory and Phenomenology [PDF]

, 2001
This article gives a brief overview of some of the theory behind the inflationary cosmology, and discusses prospects for constraining inflation using observations.
, Albrecht A, Andrew R Liddle, Brandenberger R, Bunn E F, Efstathiou G, Frieman J, Gott J R, Kallosh R, Khoury J, Lahav O, Lasenby A, Liddle A R, Netterfield C B, Schmidt B P, Turok N, Vilenkin A, Wands D, Wang X   +18 more
core   +2 more sources

CHARLES SANDERS PEIRCE AND THE PLACE OF CHAOS IN THE NEW WORLD ORDER [PDF]

Filozofia i Nauka
This article examines the main ideas of the metaphysics of the prominent American logician and philosopher Charles Sanders Peirce. It is shown that a significant part of his „scientific metaphysics” is evolutionary cosmology, characterized, in particular,
Volodymyr Ratnikov
doaj   +1 more source