Results 31 to 40 of about 896,961 (328)
Gravitational wave from warm inflation [PDF]
Physical Review D, 2018 A fundamental prediction of inflation is a nearly scale-invariant spectrum of gravitational wave. The features of such a signal provide extremely important information about the physics of the early universe.
Li, Xi-Bin, Wang, He, Zhu, Jian-Yang
core +2 more sources
Reassessing constant-roll warm inflation [PDF]
Physical Review DDeparting from standard slow-roll conditions is one way of putting the inflationary paradigm to test, and constraining the dynamics of the inflaton field with a constant-rate of roll of the inflaton field, a.k.a. the constant-roll scenario, is one way of
Sandip Biswas +2 more
semanticscholar +3 more sources
Density fluctuations from warm inflation [PDF]
, 2009 Thermal fluctuations provide the main source of large scale density perturbations in warm inflationary models of the early universe. For the first time, general results are obtained for the power spectrum in the case when the friction coefficient in the ...
A. Berera +15 more
core +2 more sources
European Physical Journal C: Particles and Fields, 2017 The warm inflation scenario in view of the modified Chaplygin gas is studied. We consider the inflationary expansion to be driven by a standard scalar field whose decay ratio $$\Gamma $$ Γ has a generic power-law dependence with the scalar field $$\phi $$
Abdul Jawad +3 more
doaj +3 more sources
Current Status of Warm Inflation [PDF]
Particle Physics at the Silver Jubilee of Lomonosov Conferences, 2018 Warm inflation is an inflationary scenario in which a thermal bath coexists with the inflaton during inflation. This is unlike standard cold inflation in which the Universe is effectively devoid of particles during inflation.
Rangarajan, Raghavan
core +2 more sources
Warm Inflation with Nonminimal Derivative Coupling [PDF]
Advances in High Energy Physics, 2014 We study the effects of the nonminimal derivative coupling on the dissipative dynamics of the warm inflation where the scalar field is nonminimally coupled to gravity via its kinetic term.
Kourosh Nozari, M. Shoukrani, N. Rashidi
doaj +2 more sources
D-brane and exponential potentials inspire warm inflation and swampland conjecture
Nuclear Physics BThis research explores the rapid expansion period of the early universe by applying the Chaplygin gas model, an alternative cosmological framework, to analyze the dynamics of inflationary processes.
Shama Sadiq +6 more
doaj +2 more sources
Warm inflation and its microphysical basis [PDF]
Reports on Progress in Physics, 2009 The microscopic quantum field theory origins of warm inflation dynamics are reviewed. The warm inflation scenario is first described along with its results, predictions and comparison with the standard cold inflation scenario. The basics of thermal field theory required in the study of warm inflation are discussed.
Arjun Berera +2 more
openalex +5 more sources
Journal of Cosmology and Astroparticle Physics, 2020 Slow-roll inflation is a successful paradigm. However we find that even a small coupling of the inflaton to other light fields can dramatically alter the dynamics and predictions of inflation. As an example, the inflaton can generically have an axion-like coupling to gauge bosons. Even relatively small couplings will automatically induce a thermal bath
Berghaus, Kim V. +2 more
openaire +2 more sources
On Warm Natural Inflation and Planck 2018 Constraints
Universe, 2023 We investigate natural inflation with non-minimal coupling to gravity, characterized either by a quadratic or a periodic term, within the warm inflation paradigm during the slow-roll stage, in both strong and weak dissipation limits; and show that, in ...
Mahmoud AlHallak +3 more
doaj +1 more source