Results 111 to 120 of about 416,864 (290)
Inflation from Extra Dimensions
, 1994 A gravity-driven inflation is shown to arise from a simple higher dimensional universe. In vacuum, the shear of $n>1$ contracting dimensions is able to inflate the remaining three spatial dimensions.
Abbott +25 more
core +1 more source
Expected value, to a point: Moral decision‐making under background uncertainty
Noûs, Volume 59, Issue 4, Page 1093-1125, December 2025.Abstract Expected value maximization gives plausible guidance for moral decision‐making under uncertainty in many situations. But it has unappetizing implications in ‘Pascalian’ situations involving tiny probabilities of extreme outcomes. This paper shows, first, that under realistic levels of ‘background uncertainty’ about sources of value independent
Christian Tarsney
wiley +1 more source
Tachyacoustic cosmology: An alternative to inflation [PDF]
Physical Review D, 2010 11 pages, LaTeX (V2: references added. Version submitted to PRD)
Bessada, Dennis +3 more
openaire +2 more sources
The cosmological heavy ion collider: Fast thermalization after cosmic inflation
Physics Letters B, 2020 Heavy-ion colliders have revealed the process of “fast thermalization”. This experimental break-through has led to new theoretical tools to study the thermalization process at both weak and strong coupling.
Evan McDonough
doaj +1 more source
On Extensions of the Starobinsky Model of Inflation
Physical Sciences Forum, 2023 We propose inflationary models that are one-parametric generalizations of the Starobinsky R+R2 model. Using the conformal transformation, we obtain scalar field potentials in the Einstein frame that are one-parametric generalizations of the potential for
Vsevolod Ivanov +3 more
doaj +1 more source
Brane inflation: A field theory approach in background supergravity
, 2012 We propose a model of inflation in the framework of brane cosmology driven by background supergravity. Starting from bulk supergravity we construct the inflaton potential on the brane and employ it to investigate for the consequences to inflationary ...
Choudhury, Sayantan, Pal, Supratik
core +1 more source
Lessons from the void: What Boltzmann brains teach
Analytic Philosophy, Volume 66, Issue 4, Page 594-621, December 2025.Abstract Some physical theories predict that almost all brains in the universe are Boltzmann brains, that is, short‐lived disembodied brains that are accidentally assembled as a result of thermodynamic or quantum fluctuations. Physicists and philosophers of physics widely regard this proliferation as unacceptable, and so take its prediction as a basis ...
Bradford Saad
wiley +1 more source
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 +1 more source
Phenomenological Inflationary Model in Supersymmetric Quantum Cosmology
Universe, 2022 We consider the effective evolution of a phenomenological model from FLRW supersymmetric quantum cosmology with a scalar field. The scalar field acts as a clock and inflaton.
Nephtalí E. Martínez-Pérez +2 more
doaj +1 more source
Cosmology Due to Thermodynamics of Apparent Horizon
Annalen der Physik, Volume 537, Issue 11, November 2025.Effective cosmological constant as a function of the Hubble rate H for different entropy parameters b. Figure shows the asymptotic of the effective cosmological constant. At H = 0 the effective cosmological constant vanishes. Abstract This study proposes new entropy of the apparent horizon Sh=(1/β)arctan(βSBH)$S_h=(1/\beta)\arctan (\beta S_{BH ...
S. I. Kruglov
wiley +1 more source