Results 21 to 30 of about 724 (182)
Tachyon field in loop cosmology
Physics Letters B, 2020 The evolutionary pictures of tachyon field in modified loop cosmology have been investigated. We present the dynamical behavior of the tachyon field associated with an exponential potential and find that the pre-inflation dynamics are very similar in ...
Kui Xiao
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Topics in Cosmology—Clearly Explained by Means of Simple Examples
Universe, 2022 This is a very comprehensible review of some key issues in modern cosmology. Simple mathematical examples and analogies are used, whenever available. The starting point is the well-known Big Bang cosmology (BBC).
Jaume de Haro, Emilio Elizalde
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Inflation in multidimensional quantum cosmology [PDF]
Physical Review D, 1996 We extend to multidimensional cosmology Vilenkin's prescription of tunnelling from nothing for the quantum origin of the observable Universe. Our model consists of a $D+4$-dimensional spacetime of topology ${\cal R}\times {\cal S}^3 \times{\cal S}^D$, with a scalar field (``chaotic inflaton'') for the matter component.
Carugno, Enrico +3 more
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European Physical Journal C: Particles and Fields, 2021 We study cosmological inflation and its dynamics in the framework of the Randall–Sundrum II brane model. In particular, we analyze in detail four representative small-field inflationary potentials, namely Natural inflation, Hilltop inflation, Higgs-like ...
Constanza Osses +2 more
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Entropic Inflation in Presence of Scalar Field
Universe, 2023 In spirit of the recently proposed four-parameter generalized entropy of apparent horizon, we investigate inflationary cosmology where the matter field inside of the horizon is dominated by a scalar field with a power law potential (i.e., the form of ϕn ...
Sergei D. Odintsov +2 more
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New Anisotropic Exact Solution in Multifield Cosmology
Universe, 2021 In the case of two-scalar field cosmology, and specifically for the Chiral model, we determine an exact solution for the field equations with an anisotropic background space.
Andronikos Paliathanasis
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Cosmology of the tachyon in brane inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2007 30 pages, 2 figures; v3, minor revision, JCAP ...
Leblond, Louis, Shandera, Sarah
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Effect of inflation on anisotropic cosmologies [PDF]
Physical Review D, 1986 We study the effects of anisotropic cosmologies on inflation. By properly formulating the field equations it is possible to show that any model that undergoes sufficient inflation will become isotropic on scales greater than the horizon today. Furthermore, we shall show that it takes a very long time for anisotropies to become visible in the observable
, Jensen, , Stein-Schabes
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MSSM inflation and cosmological attractors [PDF]
International Journal of Geometric Methods in Modern Physics, 2018 Inflationary scenarios motivated by the minimal supersymmetric standard model (MSSM) where five scalar fields are non-minimally coupled to gravity are considered. The potential of the model and the function of non-minimal coupling are polynomials of two Higgs doublet convolutions.
M. N. Dubinin +3 more
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INFLATION AND STRING COSMOLOGY [PDF]
International Journal of Modern Physics A, 2002 I will give a brief review of the various versions of inflationary theory, from Starobinsky model to chaotic inflation, and of recent observational data supporting inflationary theory. In the second part of the talk I will discuss the recently proposed ekpyrotic scenario and argue that in its present form it does not provide a viable alternative to ...
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