Results 21 to 30 of about 15,205 (269)

Observational constraints on the fractal cosmology

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
In this paper, we explore a fractal model of the universe proposed by Calcagni (J High Energy Phys 03:120, 2010) for a power-counting renormalizable field theory living in a fractal spacetime.
Mahnaz Asghari, Ahmad Sheykhi
doaj   +1 more source

Cosmological Bounce and the Cosmological Constant Problem

open access: yesSSRN Electronic Journal, 2022
32 pages, 9 ...
Pavlović, Petar, Sossich, Marko
openaire   +3 more sources

THE COSMOLOGICAL SPACETIME [PDF]

open access: yesInternational Journal of Modern Physics D, 2009
We present here the transformations required to recast the Robertson–Walker metric and Friedmann–Robertson–Walker equations in terms of observer-dependent coordinates for several commonly assumed cosmologies. The overriding motivation is the derivation of explicit expressions for the radius Rh of our cosmic horizon in terms of measurable quantities ...
Melia, Fulvio, Abdelqader, Majd
openaire   +2 more sources

Comparison of the relationship between cosmology and political thought in ancient Iran and ancient Greece. [PDF]

open access: yesرهیافتهای سیاسی و بین المللی, 2020
We know that political thought in Iran and the West has grown in two different contexts. In Iran, political thought is in the context of religious cosmology and in the West, in the context of philosophical cosmology.
Behrooz Dailam salehi
doaj  

QUANTUM COSMOLOGY [PDF]

open access: yesAnnals of the New York Academy of Sciences, 1993
10 pages, TUTP-92 ...
openaire   +3 more sources

Modular cosmology

open access: yesPhysical Review D, 1995
An exploratory study of the cosmology of moduli in string theory. Moduli are argued to be natural inflaton fields and lead to a robust inflationary cosmology in which inflation takes place at the top of domain walls. The amplitude of microwave background fluctuations constrains the dynamics responsible for inflation to take place at a higher scale than
Banks, T.   +4 more
openaire   +3 more sources

DECOHERENCE IN QUANTUM COSMOLOGY AND THE COSMOLOGICAL CONSTANT [PDF]

open access: yesModern Physics Letters A, 2013
We discuss a spacetime having the topology of S3×ℝ but with a different smoothness structure. The initial state of the cosmos in our model is identified with a wildly embedded 3-sphere (or a fractal space). In previous work we showed that a wild embedding is obtained by a quantization of a usual (or tame) embedding.
Asselmeyer-Maluga, T., Krol, J.
openaire   +2 more sources

The concept of fractal cosmos, I: Anaxagoras’ cosmology [PDF]

open access: yesSerbian Astronomical Journal, 2001
The concept of a fractal cosmos occupies a prominent position in the modern cosmology. We trace the development of this concept from the presocratic Greece to the present state of affairs.
Grujić P.V.
doaj   +1 more source

From Reductionism to Contextualism: L. Wittgenstein and the Dimensions of Modern Cosmology [PDF]

open access: yesФилософия и космология
This article offers a consideration of potential ways to apply the methodology of the philosophy of everyday language to solve modern problems of cosmology and the philosophy of cosmology. Modern cosmology emerges as an independent scientific discipline,
Pavlo Sobolievskyi
doaj   +1 more source

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