Results 131 to 140 of about 39,698 (245)

Inflationary cosmology in modified gravity theories

open access: yes, 2015
We review inflationary cosmology in modified gravity such as $R^2$ gravity with its extensions in order to generalize the Starobinsky inflation model. In particular, we explore inflation realized by three kinds of effects: modification of gravity, the ...
Bamba, Kazuharu, Odintsov, Sergei D.
core   +2 more sources

Perturbations in loop quantum cosmology [PDF]

open access: diamond, 2014
William Nelson   +2 more
openalex   +1 more source

Loop Quantum Gravity Vacuum with Nondegenerate Geometry

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2012
In loop quantum gravity, states of the gravitational field turn out to be excitations over a vacuum state that is sharply peaked on a degenerate spatial geometry.
Hanno Sahlmann, Tim Koslowski
doaj   +1 more source

Efficiently evaluating loop integrals in the EFTofLSS using QFT integrals with massive propagators

open access: yesJournal of High Energy Physics
We develop a new way to analytically calculate loop integrals in the Effective Field Theory of Large Scale-Structure. Previous available methods show severe limitations beyond the one-loop power spectrum due to analytical challenges and computational and
Charalampos Anastasiou   +3 more
doaj   +1 more source

On a Continuum Limit for Loop Quantum Cosmology [PDF]

open access: bronze, 2008
Alejandro Corichi   +5 more
openalex   +1 more source

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