Results 51 to 60 of about 2,756,107 (244)
European Physical Journal C: Particles and Fields, 2022 We consider some background tests of standard cosmology in the context of Hořava gravity with different scaling dimensions for space and time, which has been proposed as a renormalizable, higher-derivative, Lorentz-violating quantum gravity model without
Nils A. Nilsson, Mu-In Park
doaj +1 more source
On the cosmological gravitational waves and cosmological distances [PDF]
Physics Letters B 778 (2018) 332, 2017 We show that solitonic cosmological gravitational waves propagated through the Friedmann universe and generated by the inhomogeneities of the gravitational field near the Big Bang can be responsible for increase of cosmological distances.
arxiv +1 more source
Non-metricity signatures on the Higgs boson signal strengths at the LHC
Journal of High Energy Physics, 2022 In this work we study the high-energy Higgs boson phenomenology associated to the non-metricity scale Λ Q at the LHC. Non-metricity is present in more generic non-Riemannian geometries describing gravity beyond General Relativity and exhibits nice ...
Victor Ilisie
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Brane-world cosmological perturbations: a covariant approach [PDF]
, 2002 The standard cosmological model, based on general relativity with an inflationary era, is very effective in accounting for a broad range of observed features of the universe.
Maartens, Roy
core +2 more sources
Generalized Rest Mass and Dirac’s Monopole in 5D Theory and Cosmology
Universe, 2021 It is shown that the 5D geodetic equations and 5D Ricci identities give us a way to create a new viewpoint on some problems of modern physics, astrophysics, and cosmology.
Boris G. Aliyev
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, 1995 The Ashtekar variables have been use to find a number of exact solutions in quantum gravity and quantum cosmology. We investigate the origin of these solutions in the context of a number of canonical transformations (both complex and real) of the basic ...
A. Ashtekar +18 more
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Vanishing Cosmological Constant in Modified Gauss-Bonnet Gravity with Conformal Anomaly [PDF]
, 2006 We consider dark energy cosmology in a de Sitter universe filled with quantum conformal matter. Our model represents a Gauss-Bonnet model of gravity with contributions from quantum effects. To the General Relativity action an arbitrary function of the GB
Bergshoeff E. A. +18 more
core +3 more sources
Group Field Theory and Its Cosmology in a Matter Reference Frame
Universe, 2018 While the equations of general relativity take the same form in any coordinate system, choosing a suitable set of coordinates is essential in any practical application.
Steffen Gielen
doaj +1 more source
Effective actions for loop quantum cosmology in fourth-order gravity
European Physical Journal C: Particles and Fields, 2021 Loop quantum cosmology (LQC) is a theory which renders the Big Bang initial singularity into a quantum bounce, by means of short-range repulsive quantum effects at the Planck scale.
Marcello Miranda +3 more
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Quantum Gravity: General Introduction and Recent Developments
, 2005 I briefly review the current status of quantum gravity. After giving some general motivations for the need of such a theory, I discuss the main approaches in quantizing general relativity: Covariant approaches (perturbation theory, effective theory, and ...
Aharony +59 more
core +1 more source