Results 61 to 70 of about 416,864 (290)
Inflationary universe in loop quantum cosmology [PDF]
, 2007 Loop quantum cosmology provides a nice solution of avoiding the big bang singularity through a big bounce mechanism in the high energy region. In loop quantum cosmology an inflationary universe is emergent after the big bounce, no matter what matter ...
Ashtekar A +25 more
core +1 more source
Standard Model—axion—seesaw—Higgs portal inflation. Five problems of particle physics and cosmology solved in one stroke [PDF]
, 2016 We present a minimal extension of the Standard Model (SM) providing a consistent picture of particle physics from the electroweak scale to the Planck scale and of cosmology from inflation until today.
G. Ballesteros +3 more
semanticscholar +1 more source
Inflation and Alternatives with Blue Tensor Spectra
, 2014 We study the tilt of the primordial gravitational waves spectrum. A hint of blue tilt is shown from analyzing the BICEP2 and POLARBEAR data. Motivated by this, we explore the possibilities of blue tensor spectra from the very early universe cosmology ...
Wang, Yi, Xue, Wei
core +5 more sources
Physics Letters B, 2022 In Chain Inflation the universe tunnels along a series of false vacua of ever-decreasing energy. The main goal of this paper is to embed Chain Inflation in high energy fundamental physics.
Katherine Freese +2 more
doaj +1 more source
Stringy Effects During Inflation and Reheating [PDF]
, 2005 We consider inflationary cosmology in the context of string compactifications with multiple throats. In scenarios where the warping differs significantly between throats, string and Kaluza-Klein physics can generate potentially observable corrections to ...
A. Vilenkin +6 more
core +3 more sources
Alternatives to cosmological inflation [PDF]
Physics Today, 2008 Inflationary cosmology is elegant and can claim significant predictive successes. But its attendant difficulties have motivated competing scenarios that also agree with observation.
openaire +2 more sources
Semiclassical Cosmological Perturbations Generated During Inflation [PDF]
International Journal of Theoretical Physics, 2000 Environment interaction may induce stochastic semiclassical dynamics in open quantum systems. In the gravitational context, stress-energy fluctuations of quantum matter fields give rise to a stochastic behaviour in the spacetime geometry. Einstein-Langevin equation is a suitable tool to take these effects into account when addressing the back-reaction ...
Roura, Albert, Verdaguer, Enric
openaire +2 more sources
Bounce inflation in $f(T)$ Cosmology: A unified inflaton-quintessence field [PDF]
, 2016 We investigate a bounce inflation model with a graceful exit into the Friedmann-Robertson-Walker (FRW) decelerated Universe within f(T)-gravity framework, where T is the torsion scalar in the teleparallelism.
K. Bamba +3 more
semanticscholar +1 more source
Pre-Big-Bang in String Cosmology [PDF]
, 1998 We compute the amount of inflation required to solve the horizon problem of cosmology in the pre-big-bang scenario. First we give a quick overview of string cosmology as developed by Veneziano and collaborators.
Borunda, Monica, Ruiz-Altaba, M.
core +2 more sources
MSSM inflation and cosmological attractors [PDF]
International Journal of Geometric Methods in Modern Physics, 2018 Inflationary scenarios motivated by the minimal supersymmetric standard model (MSSM) where five scalar fields are non-minimally coupled to gravity are considered. The potential of the model and the function of non-minimal coupling are polynomials of two Higgs doublet convolutions.
M. N. Dubinin +3 more
openaire +3 more sources