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Signals from Fermionic inflationary cosmology with Yukawa interaction
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy PhysicsWe investigate an inflationary model wherein the Dirac field ψ is directly coupled to a scalar inflaton ϕ via a Yukawa interaction gϕψ¯ψ and examine the resulting observational implications.
Xi-Bin Li
exaly +3 more sources
Geometrothermodynamic Cosmology. [PDF]
Entropy (Basel), 2023 We review the main aspects of geometrothermodynamics, a formalism that uses contact geometry and Riemannian geometry to describe the properties of thermodynamic systems.
Luongo O, Quevedo H.
europepmc +2 more sources
Is a loopy and noncommutative early Universe viable?
Physics Letters B, 2023 We conduct a (pre-)inflationary dynamics study of the chaotic quadratic potential within the framework of a simple noncommutative extension of effective loop quantum cosmology put forward recently.
Luis Rey Díaz-Barrón +3 more
doaj +1 more source
Inflationary cosmology and thermodynamics [PDF]
Classical and Quantum Gravity, 1998 We present a simple and thermodynamically consistent cosmology with a phenomenological model of quantum creation of radiation due to vacuum decay. Thermodynamics and Einstein's equations lead to an equation in which $H$ is determined by the particle number $N$.
Gunzig, Edgard +2 more
openaire +4 more sources
Universe, 2023 Quantum cosmology aims to develop a quantum theory of the universe, attempting to answer open questions of physical cosmology, mainly related to the early epochs of the universe. Such a theory aims to unite relativity theory and quantum theory. Here, the
Shreya Banerjee
doaj +1 more source
Modulated reheating and large non-gaussianity in string cosmology [PDF]
, 2012 A generic feature of the known string inflationary models is that the same physics that makes the inflaton lighter than the Hubble scale during inflation often also makes other scalars this light.
CICOLI, MICHELE +9 more
core +3 more sources
Catch-me-if-you-can: the overshoot problem and the weak/inflation hierarchy
Journal of High Energy Physics, 2022 We study the overshoot problem in the context of post-inflationary string cosmology (in particular LVS). LVS cosmology features a long kination epoch as the volume modulus rolls down the exponential slope towards the final minimum, with an energy density
Joseph P. Conlon, Filippo Revello
doaj +1 more source
Bottom-up reconstruction of non-singular bounce in F(R) gravity from observational indices
Nuclear Physics B, 2020 We apply the bottom-up reconstruction technique in the context of bouncing cosmology in F(R) gravity, where the starting point is a suitable ansatz of observable quantity (like spectral index or tensor to scalar ratio) rather than a priori form of Hubble
S.D. Odintsov +2 more
doaj +1 more source
Towards geometric inflation: The cubic case
Physics Letters B, 2020 We present an up to cubic curvature correction to General Relativity with the following features: (i) its vacuum spectrum solely consists of a graviton, (ii) it possesses well-behaved black hole solutions which coincide with those of Einsteinian cubic ...
Gustavo Arciniega +2 more
doaj +1 more source