Results 91 to 100 of about 108,427 (203)

Bounding field excursions along null geodesics with applications to cosmology

Journal of High Energy Physics
Scalar fields in theories of gravity often inhabit a moduli space of vacua, and coherent spatial or temporal variations in their expectation values can produce measurable gravitational effects.
Aidan Herderschee, Aron C. Wall
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Principle of «Observability»: Why Cannot the Theory of the Infinite Universe be Realized?

RUDN Journal of Philosophy, 2009
The present work demonstrates that all cosmological theories obey an epistemological relation: all steps cosmology makes in the direction of acquiring the status of a natural science are inversely proportional to its steps in the direction of allowing ...
A N Pavlenko
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String Cosmology versus Standard and Inflationary Cosmology

, 2008
String cosmology versus standard and inflationary cosmology M. Gasperini###$

core  

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
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Curvature-assisted dynamical compactification in a pre-inflationary higher-dimensional universe

Journal of High Energy Physics
We investigate a pre-inflationary dynamical compactification scenario in which a higher-dimensional expanding universe evolves into an effectively four-dimensional one through curvature-assisted modulus trapping.
Yusuke Yamada
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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
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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
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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
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Constraining barrow entropy-based cosmology with power-law inflation. [PDF]

Eur Phys J C Part Fields, 2023
Luciano GG.
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Inflationary Cosmology

, 2002
The big bang model and the history of the early universe according to the grand unified theories are introduced. The shortcomings of big bang are discussed together with their resolution by inflationary cosmology. Inflation, the subsequent oscillation and decay of the inflaton, and the resulting "reheating" of the universe are studied.
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