Results 101 to 110 of about 2,808 (218)

On the present status of inflationary cosmology

General Relativity and Gravitation
We give a brief review of the basic principles of inflationary theory and discuss the present status of the simplest inflationary models that can describe Planck/BICEP/Keck observational data by choice of a single model parameter. In particular, we discuss the Starobinsky model, Higgs inflation, and $α$-attractors, including the recently developed $α ...
Kallosh, Renata, Linde, Andrei
openaire   +2 more sources

The dynamics of cosmological scenarios inspired by quantum gravity

, 2006
PhDIn this thesis we study the dynamics of cosmological scenarios inspired by quantum gravity. Part I investigates novel features of the semi-classical regime of homogeneous and isotropic loop quantum cosmology.
Mulryne, David James
core  

Brane-World Gravity [PDF]

, 2010
The observable universe could be a 1+3-surface (the “brane”) embedded in a 1+3+d-dimensional spacetime (the “bulk”), with Standard Model particles and fields trapped on the brane while gravity is free to access the bulk.
Roy Maartens, Kazuya Koyama, Maartens, Roy, Koyama, Kazuya   +3 more
core   +1 more source

Warm Inflation

Universe, 2016
I show here that there are some interesting differences between the predictions of warm and cold inflation models focusing in particular upon the scalar spectral index n s and the tensor-to-scalar ratio r.
Øyvind Grøn
doaj   +1 more source

Physical consequences of black holes in non-perturbative quantum gravity and inflationary cosmology

, 2011
In this thesis the consequences of the presence of a Schwarzschild black hole in de Sitter space are studied in the setting of non-perturbative quantum gravity and in inflationary cosmology.
Sub String Theory Cosmology and ElemPart, Reska, P.M., Theoretical Physics   +2 more
core  

EFT beyond the horizon:stochastic inflation and how primordial quantum fluctuations go classical [PDF]

, 2014
We identify the effective theory describing inflationary super-Hubble scales and show it to be a special case of effective field theories appropriate to open systems.
Burgess, C. P., M. Williams, Gianmassimo Tasinato, Holman, R., C. P. Burgess, C. P. Burgess, Tasinato, G., Williams, M., Burgess, C.P., R. Holman, G. Tasinato   +10 more
core   +1 more source

Non-commutativity in modified loop cosmology

European Physical Journal C: Particles and Fields
In this study, we explore the pre-inflationary dynamics of the universe using a non-commutative extension of the mLQC-I framework. By incorporating a scalar field potential, we show that key features of Loop Quantum Cosmology (LQC), such as the quantum ...
Abolhassan Mohammadi
doaj   +1 more source

Inflationary Cosmology

, 1997
Inflation is a bold and expansive extension of the Standard Cosmology. It holds the promise to extend our understanding of the Universe to within 10^{-32}sec of the big bang and answer most of the pressing questions in cosmology. Its boldest assertion is that all the structure observed in the Universe today arose from quantum-mechanical fluctuations on
openaire   +2 more sources

braneworld cosmology and holography [PDF]

, 2002
This thesis is devoted to studying two important aspects of braneworld physics: their cosmology and their holography. We examine the Einstein equations induced on a general (n - 2)-brane of arbitrary tension, embedded in some n-dimensional bulk.
Padilla, Antonio
core  

Approximate reconstruction of inflationary potential with ACT observations

Physics Letters B
The Atacama Cosmology Telescope (ACT) has recently reported updated measurements of the scalar spectral index ns, revealing a tension with the predictions of many conventional inflationary models. In this work, we adopt a parameterization of the spectral
Zhu Yi, Xingzhi Wang, Qing Gao, Yungui Gong   +3 more
doaj   +1 more source