Results 91 to 100 of about 20,263 (249)
Little inflatons and gauge inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2004 25 pages; corrections, references added, discussion modified including consideration of WMAP ...
Kaplan, David E., Weiner, Neal
openaire +2 more sources
The branch‐cut quantum gravity with a self‐coupling inflation scalar field: Dynamical equations
Astronomische Nachrichten, Volume 345, Issue 2-3, February-March 2024.Abstract This article focuses on the implications of the recently developed commutative formulation based on branch‐cutting cosmology, the Wheeler–DeWitt equation, and Hořava–Lifshitz quantum gravity. Assuming a mini‐superspace of variables, we explore the impact of an inflaton‐type scalar field ϕ(t)$$ \phi (t) $$ on the dynamical equations that ...
Fridolin Weber +8 more
wiley +1 more source
On Chaplygin Gas Braneworld Inflation with Monomial Potential
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 We study the Chaplygin gas model as a candidate for inflation in the framework of the Randall‐Sundrum type II braneworld model. We consider the original and generalized Chaplygin gas model in the presence of monomial potential. The inflationary spectrum perturbation parameters are reformulated and evaluated in the high‐energy limit and we found that ...
A. Safsafi +5 more
wiley +1 more source
Ultra-high frequency gravitational waves from scattering, Bremsstrahlung and decay during reheating
Journal of High Energy PhysicsWe investigate ultra-high frequency gravitational waves (GWs) from gravitons generated during inflationary reheating. Specifically, we study inflaton scattering with its decay product, where the couplings involved in this 2 → 2 scattering are the same as
Yong Xu
doaj +1 more source
R-symmetric axion/natural inflation in supergravity via deformed moduli dynamics
Physics Letters B, 2014 We construct a natural inflation model in supergravity where the inflaton is identified with a modulus field possessing a shift symmetry. The superpotential for the inflaton is generated by meson condensation due to strong dynamics with deformed moduli ...
Keisuke Harigaya +2 more
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Classical Decay of the Inflaton [PDF]
Physical Review Letters, 1996 We present the first fully nonlinear calculation of inflaton decay. We map inflaton decay onto an equivalent classical problem and solve the latter numerically. In the $\ensuremath{\lambda}{\ensuremath{\varphi}}^{4}$ model, we find that parametric resonance develops slower and ends at smaller values of fluctuating fields, as compared to estimates ...
, Khlebnikov, , Tkachev
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Violent Preheating in Inflation with Nonminimal Coupling
, 2017 We study particle production at the preheating era in inflation models with nonminimal coupling $\xi \phi^2R$ and quartic potential $\lambda \phi^4/4$ for several cases: real scalar inflaton, complex scalar inflaton and Abelian Higgs inflaton.
Ema, Yohei +3 more
core +1 more source
The Chaotic Regime of D-Term Inflation
, 2014 We consider D-term inflation for small couplings of the inflaton to matter fields. Standard hybrid inflation then ends at a critical value of the inflaton field that exceeds the Planck mass.
Buchmuller, W., Domcke, V., Schmitz, K.
core +1 more source
Hot Big Bang from inflation without the inflaton reheating [PDF]
, 2023 Alex Buchel
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Clockwork inflation with non-minimal coupling
European Physical Journal C: Particles and Fields, 2019 We suggest a clockwork mechanism for a Higgs-like inflation with the non-minimal coupling term $$\xi \phi ^2 R$$ ξϕ2R . The seemingly unnatural ratio of parameters, $$\lambda /\xi ^2 \sim 10^{-10}$$ λ/ξ2∼10-10 of the self quartic coupling of the inflaton,
Seong Chan Park, Chang Sub Shin
doaj +1 more source