Results 21 to 30 of about 108,427 (203)
Von Neumann algebra description of inflationary cosmology
European Physical Journal C: Particles and Fields, 2023 We study the von Neumann algebra description of the inflationary quasi-de Sitter (dS) space. Unlike perfect dS space, quasi-dS space allows the nonzero energy flux across the horizon, which can be identified with the expectation value of the static time ...
Min-Seok Seo
doaj +1 more source
How Generic Is Eternal Inflation?
Sci, 2022 Everlasting inflation has far-reaching implications for cosmology and the standing of self-localizing inferences made by observers, which have been subjects of renewed interest in light of the growing acceptance of theory landscapes and the attendant ...
Ross Greenwood, Anthony Aguirre
doaj +1 more source
Aspects of inflationary cosmology [PDF]
, 2016 We discuss aspects of excited initial states in inflationary cosmology. We review the basic framework of inflationary cosmology and how to compute observable correlation functions. The framework of excited initial states is introduced and the corrections
Lorshbough, Dustin Eldon
core +3 more sources
Gravitational Fluctuations as an Alternative to Inflation II. CMB Angular Power Spectrum
Universe, 2019 Power spectra always play an important role in the theory of inflation. In particular, the ability to reproduce the galaxy matter power spectrum P ( k ) and the CMB temperature angular power spectrum C l ’s to high accuracy is often ...
Herbert W. Hamber, Lu Heng Sunny Yu
doaj +1 more source
European Physical Journal C: Particles and Fields, 2021 We propose an extension of the scalaron-Higgs model by a non-minimal coupling of the Standard Model Higgs boson to the quadratic Ricci scalar resulting in a Higgs-dependent scalaron mass.
Anirudh Gundhi, Christian F. Steinwachs
doaj +1 more source
Branes and inflationary cosmology
Physics Letters B, 2002 14 pages, LaTeX, 4 eps ...
Kyae, Bumseok, Shafi, Qaisar
openaire +3 more sources
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
doaj +1 more source
RECENT PROGRESS IN INFLATIONARY COSMOLOGY [PDF]
COSMO-97, 1998 We discuss two important modifications of inflationary paradigm. Until very recently we believed that inflation automatically leads to flatness of the universe, Omega = 1. We also thought that post-inflationary phase transitions in GUTs may occur only after thermalization, which made it very difficult to have baryogenesis in GUTs and to obtain ...
openaire +2 more sources
Gravitational Fluctuations as an Alternative to Inflation
Universe, 2019 The ability to reproduce the observed matter power spectrum P ( k ) to high accuracy is often considered as a triumph of inflation. In this work, we explore an alternative explanation for the power spectrum based on nonperturbative quantum field ...
Herbert W. Hamber
doaj +1 more source
Bottom-up reconstruction of non-singular bounce in F(R) gravity from observational indices
Nuclear Physics B, 2020 We apply the bottom-up reconstruction technique in the context of bouncing cosmology in F(R) gravity, where the starting point is a suitable ansatz of observable quantity (like spectral index or tensor to scalar ratio) rather than a priori form of Hubble
S.D. Odintsov +2 more
doaj +1 more source