Reconstruction and exact solutions for cosmological perturbations from a generalized gravity theory
Sign Up to like & getrecommendations! Published in 2020 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-020-02685-z
Abstract: Scalar and tensor cosmological perturbations during an inflationary universe scenario in the context of the a generalized gravity theory are studied. This analyze is carried out considering an ansatz on the variables associated to scalar… read more here.
Keywords: gravity theory; generalized gravity; cosmological perturbations; solutions cosmological ... See more keywords
Tunneling analysis under the influences of Einstein-Gauss–Bonnet black holes gravity theory
Sign Up to like & getrecommendations! Published in 2022 at "New Astronomy"
DOI: 10.1016/j.newast.2021.101759
Abstract: We consider an equation of motion for Glashow-Weinberg-Salam model and apply the semiclassical Hamilton-Jacobi process and WKB approximation in order to compute the tunneling probability of W-bosons in the background of electromagnetic field to analyze… read more here.
Keywords: gauss bonnet; gravity; quantum gravity; einstein gauss ... See more keywords
Dynamics of the generalized unimodular gravity theory
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DOI: 10.1103/physrevd.100.023542
Abstract: The Hamiltonian formalism of the generalized unimodular gravity theory, which was recently suggested as a model of dark energy, is shown to be a complicated example of constrained dynamical system. The set of its canonical… read more here.
Keywords: theory; gravity theory; dark; generalized unimodular ... See more keywords
Testing modified gravity theory in the Milky Way
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.98.104061
Abstract: We perform a test of John Moffat's Modified Gravity theory (MOG) within the Milky Way, adopting the well known "Rotation Curve" method. We use the dynamics of observed tracers within the disk to determine the… read more here.
Keywords: gravity theory; modified gravity; milky way; theory ... See more keywords
Thermodynamic properties of novel black hole solutions in the Einstein–Born–Infeld-dilaton gravity theory
Sign Up to like & getrecommendations! Published in 2020 at "European Physical Journal C"
DOI: 10.1140/epjc/s10052-020-08564-w
Abstract: The exact solutions of coupled scalar, electromagnetic and gravitational field equations have been obtained in the framework of Einstein-dilaton gravity theory which is coupled to the Born–Infeld nonlinear electrodynamics. The solutions show that Einstein–Born–Infeld-dilaton gravity… read more here.
Keywords: dilaton gravity; black holes; gravity theory; black hole ... See more keywords
Wormhole solutions in Rastall gravity theory
Sign Up to like & getrecommendations! Published in 2019 at "Modern Physics Letters A"
DOI: 10.1142/s0217732319500950
Abstract: This work looks for new wormhole solutions in the non-conservative Rastall gravity. Although Rastall gravity is considered to be a higher-dimensional gravity, the actual diversion from general relativity essentially happens due to a modification in… read more here.
Keywords: gravity theory; wormhole solutions; gravity; solutions rastall ... See more keywords
Some specific wormhole solutions in f(R)-modified gravity theory
Sign Up to like & getrecommendations! Published in 2021 at "Modern Physics Letters A"
DOI: 10.1142/s0217732321500243
Abstract: The paper deals with the static spherically symmetric wormhole solutions in f(R)-modified gravity theory with anisotropic matter field and for some particular choices for the shape functions. This ... read more here.
Keywords: wormhole solutions; modified gravity; solutions modified; gravity theory ... See more keywords
Foundational issues in f(T) gravity theory
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Geometric Methods in Modern Physics"
DOI: 10.1142/s0219887821400077
Abstract: We give a short review on the status of research on the theoretical foundations of $f(T)$ gravity theories. We discuss recent results on perturbative and non-perturbative approaches, causality and degrees of freedom, and discuss future… read more here.
Keywords: foundational issues; gravity; gravity theory; issues gravity ... See more keywords