Results 111 to 120 of about 406,699 (273)
Cosmological Inflation: Theory and Observations [PDF]
Advanced Science Letters, 2009 In this article we review the theory of cosmological inflation with a particular focus on the beautiful connection it provides between the physics of the very small and observations of the very large. We explain how quantum mechanical fluctuations during the inflationary era become macroscopic density fluctuations which leave distinct imprints in the ...
Hiranya V. Peiris, Daniel Baumann
openaire +3 more sources
Warm inflation in loop quantum cosmology: a model with a general dissipative coefficient [PDF]
, 2013 A general form of warm inflation with the dissipative coefficient $\ensuremath{\Gamma}={\ensuremath{\Gamma}}_{0}(\ensuremath{\phi}/{\ensuremath{\phi}}_{0}{)}^{n}(T/{\ensuremath{\tau}}_{0}{)}^{m}$ in loop quantum cosmology is studied.
Xiao-Min Zhang, Jian-yang Zhu
semanticscholar +1 more source
Primordial black holes from the preheating instability in single-field inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 After the end of inflation, the inflaton field oscillates around a local minimum of its potential and decays into ordinary matter. These oscillations trigger a resonant instability for cosmological perturbations with wavelengths that exit the Hubble ...
Jérôme Martin +2 more
semanticscholar +1 more source
Two Micron‐Size Dark Dimensions
Fortschritte der Physik, Volume 73, Issue 8, August 2025.Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui +2 more
wiley +1 more source
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
Cosmological Perturbations in Bouncing Cosmologies and the Case of the Pre-Big Bang Scenario
Universe, 2022 Pre-Big Bang cosmology inspired generations of cosmologists in attempts to cure the initial Big Bang singularity using a fundamental length scale as proposed by string theory.
Valerio Bozza
doaj +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
Journal of Geophysical Research: Planets, Volume 130, Issue 8, August 2025.Abstract Volcanic materials exert both downward and upward forces on a planet's lithosphere, depending on where they are emplaced. On Mars, numerous studies have used gravity and topography data to ascertain the contribution of each of these styles of emplacement to measured fields.
N. L. Wagner, P. B. James
wiley +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
Stable bounce and inflation in non-local higher derivative cosmology [PDF]
, 2012 One of the greatest problems of primordial inflation is that the inflationary space-time is past-incomplete. This is mainly because Einstein's GR suffers from a space-like Big Bang singularity. It has recently been shown that ghost-free, non-local higher-
Tirthabir Biswas +3 more
semanticscholar +1 more source