Results 211 to 220 of about 32,779 (246)
AI-Assisted Detection of Residual Time-Field (γ) in Hilltop Inflationary Cosmology
Sukhdevbhai Shanabhai Harijan
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Vacuumlike State of Matter and Inflationary Scenarios in Cosmology
, 1987 Erast B. Gliner
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Extended Inflationary Cosmology
Physical Review Letters, 1989We present a new type of inflationary scenario based on metric formulations of gravity different from that of Einstein, e.g., a Brans-Dicke theory of gravity. Unlike previous inflation models, the inflationary phase transition can be completed via bubble nucleation.
, La, , Steinhardt
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Inflationary cosmology: First 30+ years
International Journal of Modern Physics D, 2015Starting with an account of historical developments in Japan and Russia, we review inflationary cosmology and its basic predictions in a pedagogical manner. We also introduce the generalized G-inflation model, in terms of which all the known single-field inflation models may be described.
Sato, Katsuhiko, Yokoyama, Jun'ichi
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Physical Review Letters, 1991
If Peccei-Quinn (PQ) symmetry is broken after inflation, the initial axion angle is a random variable on cosmological scales; based on this fact, estimates of the relic-axion mass density give too large a value if the axion mass is less than about 10 to the -6th eV. This bound can be evaded if the universe underwent inflation after PQ-symmetry breaking
, Turner, , Wilczek
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If Peccei-Quinn (PQ) symmetry is broken after inflation, the initial axion angle is a random variable on cosmological scales; based on this fact, estimates of the relic-axion mass density give too large a value if the axion mass is less than about 10 to the -6th eV. This bound can be evaded if the universe underwent inflation after PQ-symmetry breaking
, Turner, , Wilczek
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Pramana, 1993
We review the basic features of the inflationary scenarios associated with phase transitions in the very early universe.
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We review the basic features of the inflationary scenarios associated with phase transitions in the very early universe.
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Exact inflationary cosmologies with exit
Physical Review D, 1995We find exact inflationary solutions with exit, including exact forms of the potential, by specifying the rate of expansion and using the number of e-foldings as the effective dynamical variable. These include solutions in which the potential drives nearly exponential or power-law inflation for ${\mathit{t}}_{\mathit{i}}$\ensuremath{\le}t${\mathit{t}}_{
, Maartens, , Taylor, , Roussos
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Diffusive inflationary cosmology
Journal of Geometry and Physics, 1990The author considers the Ricci flow equation \(g'(t)=-2k Ric(g(t))+Dg(t)\) for a Riemannian metric g(t) on a compact 3-manifold, where k and D are some constants. This is related to general relativity by considering a corresponding Lorentzian metric \(^{(4)}g=-c^ 2dt^ 2+g(t).\) For metrics of this form, Einstein's vacuum field equation with ...
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