Results 21 to 30 of about 771,516 (312)

A comparative analysis of dissipation coefficients in warm inflation [PDF]

Journal of Cosmology and Astroparticle Physics
In the warm inflation scenario, the early cosmic acceleration is driven by the inflaton coupled to thermal fields, decaying into radiation and leaving a hot universe populated by relativistic particles after the end of inflation.
F. B. M. dos Santos, R. de Souza, J. S. Alcaniz   +2 more
openalex   +3 more sources

Warm Higgs–Starobinsky inflation [PDF]

European Physical Journal C: Particles and Fields, 2022
In this work, we investigate the Higgs–Starobinsky (HS) model in the context of warm inflation scenario. The dissipative parameter as a linear form of temperature of warm inflation is considered with strong and weak regimes.
Daris Samart, Patinya Ma-adlerd, Phongpichit Channuie   +2 more
doaj   +3 more sources

Does fractal universe favour warm inflation: Observational support? [PDF]

Nuclear Physics B, 2022
The present work examines the possibility of warm inflationary paradigm in the modified gravity theory with fractal geometry. By choosing the normal fluid as radiation fluid and the effective fluid (with the extra term in modified field equation) as the ...
Akash Bose, Subenoy Chakraborty
doaj   +2 more sources

A generalized method of constraining Warm Inflation with CMB data [PDF]

Journal of Cosmology and Astroparticle Physics
A thorough MCMC analysis of any inflationary model against the current cosmological data is essential for assessing the validity of such a model as a viable inflationary model.
Umang Kumar, Suratna Das
openalex   +3 more sources

Chromonatural warm inflation [PDF]

Physical Review D
Chromonatural inflation is a model where non-Abelian gauge fields are sustained by the coupling of the axion with the gauge field through the Chern-Simons term, while minimal warm inflation is a model where the axion produces a thermal bath of non ...
Ann Mukuno, Jiro Soda
semanticscholar   +2 more sources

Dynamics of warm power-law plateau inflation with a generalized inflaton decay rate: predictions and constraints after Planck 2015 [PDF]

European Physical Journal C: Particles and Fields, 2017
In the present work, we study the consequences of considering a new family of single-field inflation models, called power-law plateau inflation, in the warm inflation framework.
Abdul Jawad, Nelson Videla, Faiza Gulshan   +2 more
doaj   +2 more sources

Minimal warm inflation [PDF]

Journal of Cosmology and Astroparticle Physics, 2019
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.
K. V. Berghaus, P. Graham, D. Kaplan
semanticscholar   +5 more sources

Warm inflation in hybrid metric-Palatini gravity under standard and irreversible thermodynamical approach

European Physical Journal C: Particles and Fields, 2023
The idea of hybrid metric-Palatini $$f({\mathcal {X}})$$ f ( X ) gravity (HMPG) is a blend of Einstein Hilbert (EH) action having non-linear function f(R) and linear scalar curvature R by Palatini gravity.
Iqra Shahid, Rabia Saleem, Hafiza Rizwana Kausar   +2 more
doaj   +2 more sources

Intermediate class of warm pseudoscalar inflation [PDF]

European Physical Journal C: Particles and Fields, 2021
High dissipative regime of warm pseudoscalar inflation model (Kamali in Phys Rev D 100:043520, arXiv:1901.01897 [gr-qc], 2019) with an approximately constant value of dissipation parameter Q is studied.
Saeid Ebrahimi, Vahid Kamali, Asma Alaei
doaj   +3 more sources

Cosmological viability of a double field unified model from warm inflation

Physics Letters B, 2022
In this paper, we investigate the cosmological viability of a double scalar field model motivated by warm inflation. To this end, we first set up the theoretical framework in which dark energy, dark matter and inflation are accounted for in a triple ...
Rocco D'Agostino, Orlando Luongo
doaj   +2 more sources