Results 21 to 30 of about 416,864 (290)
Cosmic Inflation, Quantum Information and the Pioneering Role of John S Bell in Cosmology [PDF]
Universe, 2019 According to the theory of cosmic inflation, the large scale structures observed in our Universe (galaxies, clusters of galaxies, Cosmic Background Microwave—CMB—anisotropy…) are of quantum mechanical origin. They are nothing but vacuum
Jérôme Martin
doaj +2 more sources
Emergent cosmology, inflation and dark energy [PDF]
General Relativity and Gravitation, 2015 v.1 14 pages, 2 figures; v.2 references and acknowledgements added; v.3 very significant upgrade - 24 pages, change of list of authors, two new sections, extended abstract, introduction and conclusions, additional citations and acknowledgements; v.4 title shortened, further improvements, version to appear in "General Relativity and Gravitation"
Guendelman, Eduardo +4 more
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Observational constraints on warm inflation in loop quantum cosmology [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 By incorporating quantum aspects of gravity, Loop Quantum Cosmology (LQC) provides a self-consistent extension of the inflationary scenario, allowing for modifications in the primordial inflationary power spectrum with respect to the standard General ...
Micol Benetti +2 more
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, 2012 The very basics of cosmological inflation are discussed. We derive the equations of motion for the inflaton field, introduce the slow-roll parameters, and present the computation of the inflationary perturbations and their connection to the temperature fluctuations of the cosmic microwave background.
Kari Enqvist
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Triple unification of inflation, dark energy, and dark matter in two-scalar-field cosmology [PDF]
Physical Review D, 2020 A unified description of inflation, dark energy, and dark matter is presented within a two-scalar-field cosmological model. Inflation, assumed to be of the warm type, is driven by one of the scalar fields, which, shortly after the end of the inflationary
Paulo M. Sá
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Precision cosmology and the stiff-amplified gravitational-wave background from inflation: NANOGrav, Advanced LIGO-Virgo and the Hubble tension [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 The recent NANOGrav finding of a common-spectrum process has invited interpretations as possible evidence of a primordial stochastic gravitational-wave background (SGWB) stronger than predicted by standard inflation + ΛCDM.
Bohua Li, P. Shapiro
semanticscholar +1 more source
G-bounce inflation: towards nonsingular inflation cosmology with galileon field [PDF]
Journal of High Energy Physics, 2015 A bstractWe study a nonsingular bounce inflation model, which can drive the early universe from a contracting phase, bounce into an ordinary inflationary phase, followed by the reheating process.
Taotao Qiu, Yu-tong Wang
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Non-minimal Higgs inflation and frame dependence in cosmology [PDF]
, 2013 We investigate a very general class of cosmological models with scalar fields non-minimally coupled to gravity. A particular representative in this class is given by the non-minimal Higgs inflation model in which the Standard Model Higgs boson and the ...
Christian F. Steinwachs +1 more
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Early and late universe holographic cosmology from a new generalized entropy
Physics Letters B, 2022 We propose a new four-parameter entropy function that generalizes the Tsallis, Rényi, Barrow, Sharma-Mittal, Kaniadakis and Loop Quantum Gravity entropies for suitable limits of the parameters.
Shin'ichi Nojiri +2 more
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Phenomenology and cosmology of no-scale attractor models of inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 We have recently proposed attractor models for modulus fixing, inflation, supersymmetry breaking and dark energy based on no-scale supergravity. In this paper we develop phenomenological and cosmological aspects of these no-scale attractor models that ...
J. Ellis +3 more
semanticscholar +1 more source