Results 101 to 110 of about 39,130 (174)

A Non-Polynomial Gravity Formulation for Loop Quantum Cosmology Bounce

open access: yesGalaxies, 2017
Recently the so-called mimetic gravity approach has been used to obtain corrections to the Friedmann equation of General Relativity similar to the ones present in loop quantum cosmology.
Stefano Chinaglia   +2 more
doaj   +1 more source

Loop Quantum Gravity Phenomenology: Linking Loops to Observational Physics

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2012
Research during the last decade demonstrates that effects originating on the Planck scale are currently being tested in multiple observational contexts.
Florian Girelli   +2 more
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

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

The early universe in loop quantum cosmology

open access: yesJournal of Physics: Conference Series, 2005
Loop quantum cosmology applies techniques derived for a background independent quantization of general relativity to cosmological situations and draws conclusions for the very early universe. Direct implications for the singularity problem as well as phenomenology in the context of inflation or bouncing universes result, which will be reviewed here ...
openaire   +3 more sources

Unitary evolution and cosmic acceleration in Loop Quantum Cosmology

open access: yesPhysics Letters B
Loop quantum cosmology was shown to interpolate between de Sitter and FLRW Universe phases through a bounce by including Euclidean and Lorentzian terms of the Hamiltonian constraint with weight one -that corresponding to classical General Relativity ...
Omar Gallegos   +2 more
doaj   +1 more source

Projective structures in loop quantum cosmology

open access: yesJournal of Mathematical Analysis and Applications, 2015
Projective structures have successfully been used for the construction of measures in the framework of loop quantum gravity. In the present paper, we establish such structures for the configuration space $\mathbb{R}\sqcup \mathbb{R}_{\mathbb{Bohr}}$, recently introduced in the context of homogeneous isotropic loop quantum cosmology.
openaire   +2 more sources

Cosmological Perturbations in Loop Quantum Cosmology

open access: yes, 2014
Presentación en Power Point con 32 diapositivas.
Mena Marugán, Guillermo A.   +3 more
openaire   +1 more source

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