Results 41 to 50 of about 531,343 (389)
Observational constraints on the fractal cosmology
European 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
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Journal of Cosmology and Astroparticle Physics, 2016 33 pages, 4 ...
Kehagias, A., Riotto, A.
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Cosmology at high redshift — a probe of fundamental physics [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 An observational program focused on the high redshift ...
N. Sailer +3 more
semanticscholar +1 more source
Symmetry, Integrability and Geometry: Methods and Applications, 2016 We shall discuss cosmological models in extended theories of gravitation. We shall define a surface, called the model surface, in the space of observable parameters which characterises families of theories. We also show how this surface can be used to compare with observations.
CAPOZZIELLO, SALVATORE +4 more
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The Atacama Cosmology Telescope: a measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 We present the temperature and polarization angular power spectra of the CMB measured by the Atacama Cosmology Telescope (ACT) from 5400 deg2 of the 2013–2016 survey, which covers >15000 deg2 at 98 and 150 GHz.
Steve K. Choi +138 more
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Extending cosmology: the metric approach [PDF]
, 2012 In this chapter it is shown how the introduction of a fundamental constant of nature with dimensions of acceleration into the theory of gravity makes it possible to extend gravity in a very consistent manner.Comment: 2012, Extending Cosmology: The Metric
Mendoza, S.
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Comparison of the relationship between cosmology and political thought in ancient Iran and ancient Greece. [PDF]
رهیافتهای 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
Holography and cosmology [PDF]
Physics Letters B, 1999 We consider a recent generalisation by Bousso of an earlier holography proposal by Fischler and Susskind. We demonstrate that in general inhomogeneous universes such a proposal would involve extremely complicated - possibly fractal - light sheets. Furthermore, in general such a light sheet cannot be known a priori on the basis of theory and moreover ...
Reza Tavakol +2 more
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Physical Review D, 2020 We build upon previous investigation of the one-dimensional conformal symmetry of the Friedman-Lema\^ itre-Robertson-Walker (FLRW) cosmology of a free scalar field and make it explicit through a reformulation of the theory at the classical level in terms of a manifestly $\textrm{SL}(2,\mathbb{R})$-invariant action principle. The new tool is a canonical
Ben Achour, Jibril, Livine, Etera R.
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Classical and Quantum Solutions and the Problem of Time in $R^2$ Cosmology [PDF]
, 1995 We have studied various classical solutions in $R^2$ cosmology. Especially we have obtained general classical solutions in pure $R^2$\ cosmology. Even in the quantum theory, we can solve the Wheeler-DeWitt equation in pure $R^2$\ cosmology exactly ...
Banks T +22 more
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