Results 51 to 60 of about 48,355 (157)
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 +2 more sources
, 2006 These lectures present a brief review of inflationary cosmology, provide an overview of the theory of cosmological perturbations, and then focus on the conceptual problems of the current paradigm of early universe cosmology, thus motivating an ...
Robert Brandenberger +1 more
core +3 more sources
Eternal inflation with Liouville cosmology [PDF]
Nuclear Physics B, 2011 32 pages, v2: published version, many ...
openaire +3 more sources
Unity of Cosmological Inflation Attractors
Physical Review Letters, 2015 Recently, several broad classes of inflationary models have been discovered whose cosmological predictions, in excellent agreement with Planck, are stable with respect to significant modifications of the inflaton potential. Some classes of models are based on a nonminimal coupling to gravity. These models, which we call ξ attractors, describe universal
Galante, Mario +3 more
openaire +3 more sources
Why do Public Debates Escalate? Trigger Points and the Moral Dynamics of “Hot Politics”
The British Journal of Sociology, EarlyView.ABSTRACT Escalating, emotionally charged, and moralized forms of controversy are a central feature of contemporary politics. Our study develops a framework for understanding how political debates between ordinary citizens become heated; why certain issues provoke particularly strong emotions; and how this affective potential is weaponized by ...
Linus Westheuser +2 more
wiley +1 more source
Observational constraints on braneworld chaotic inflation [PDF]
, 2003 We examine observational constraints on chaotic inflation models in the Randall-Sundrum Type II braneworld. If inflation takes place in the high-energy regime, the perturbations produced by the quadratic potential are further from scale-invariance than ...
A. Mazumdar +23 more
core +2 more sources
Observational Exclusion of a Consistent Quantum Cosmology Scenario
, 2015 It is often argued that inflation erases all the information about what took place before it started. Quantum gravity, relevant in the Planck era, seems therefore mostly impossible to probe with cosmological observations.
Barrau, Aurelien +3 more
core +3 more sources
Meteoritics &Planetary Science, EarlyView.Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson +3 more
wiley +1 more source
Fundamental forces and scalar field dynamics in the early universe
Physics Letters B, 2020 Scalar weak gravity conjectures (SWGCs) attempt to pinpoint the ranges of couplings consistent with a fundamental theory of all interactions. We identify a generic dynamical consequence of these conjectures for cosmology and show that SWGCs imply a ...
Alexander Kusenko +3 more
doaj +1 more source
, 2001 The big bang model and the history of the early universe according to the grand unified theories are introduced. The shortcomings of big bang are discussed together with their resolution by inflationary cosmology.
Lazarides, G.
core +2 more sources