Results 101 to 110 of about 180,985 (262)
Inhomogeneities from quantum collapse scheme without inflation
Physics Letters B, 2015 In this work, we consider the problem of the emergence of seeds of cosmic structure in the framework of the non-inflationary model proposed by Hollands and Wald.
Gabriel R. Bengochea +2 more
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Two Micron‐Size Dark Dimensions
Fortschritte der Physik, Volume 73, Issue 8, August 2025.Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui +2 more
wiley +1 more source
, 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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Journal of Geophysical Research: Planets, Volume 130, Issue 8, August 2025.Abstract Volcanic materials exert both downward and upward forces on a planet's lithosphere, depending on where they are emplaced. On Mars, numerous studies have used gravity and topography data to ascertain the contribution of each of these styles of emplacement to measured fields.
N. L. Wagner, P. B. James
wiley +1 more source
Symmetry analysis in inflationary cosmology [PDF]
AIP Conference Proceedings, 2019 We approach the cosmological inflation thought symmetries of differential equations. We consider the general inflaton field in a homogeneous Friedmann--Lema\^ tre--Robertson--Walker spacetime and with the use of conformal transformations we are able to write the generic algebraic solution for the field equations.
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Journal of Evaluation in Clinical Practice, Volume 31, Issue 5, August 2025.Abstract Medicine is a compound field composed of science and art. The (necessary) degree to which the latter is involved opens medicine, in particular, to the introduction of ideas which do not, by their very nature, submit to confirmation or confutation as do the various methods of traditional science.
Steven K. Baker
wiley +1 more source
Some inflationary Einstein-Aether cosmologies [PDF]
Physical Review D, 2012 We show how to derive several families of accelerating universe solutions to an Einstein-Aether gravity theory. These solutions provide possible descriptions of inflationary behaviour in the early universe and late-time cosmological acceleration.
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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
doaj
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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Inflationary cosmology: theory and phenomenology
Classical and Quantum Gravity, 2002 This article gives a brief overview of some of the theory behind the inflationary cosmology, and discusses prospects for constraining inflation using observations. Particular care is given to the question of falsifiability of inflation or of subsets of inflationary models.
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