Results 51 to 60 of about 621,294 (188)
Quasinormal modes, stability and shadows of a black hole in the 4D Einstein–Gauss–Bonnet gravity
European Physical Journal C: Particles and Fields, 2020 Recently a D-dimensional regularization approach leading to the non-trivial $$(3+1)$$ ( 3 + 1 ) -dimensional Einstein–Gauss–Bonnet (EGB) effective description of gravity was formulated which was claimed to bypass the Lovelock’s theorem and avoid ...
R. A. Konoplya, A. F. Zinhailo
doaj +1 more source
European Physical Journal C: Particles and Fields, 2022 We investigate the gravitational backreaction, generated by coupling a general conformal sector to external, classical gravity, as described by a conformal anomaly effective action.
Claudio Corianò +2 more
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Effect of Horndeski Theory on Weak Deflection Angle Using the Gauss-Bonnet Theorem
International Journal of Geometric Methods in Modern Physics (IJGMMP), 2021 The main goal of this paper is to study the weak gravitational lensing by Horndeski black hole in weak field approximation. In order to do so, we exploit the Gibbons-Werner method to the optical geometry of Horndeski black hole and implement the Gauss ...
A. Övgün +3 more
semanticscholar +1 more source
Charged black holes in AdS spaces in 4D Einstein Gauss-Bonnet gravity
Physics Letters B, 2020 Recently a non-trivial 4-dimensional theory of gravity that claims to circumvent Lovelock's theorem and avoid Ostrogradsky instability was formulated in Glavan and Lin (2020) [1].
Pedro G.S. Fernandes
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Weak gravitational deflection by two-power-law densities using the Gauss-Bonnet theorem [PDF]
Physical Review D, 2019 We study the weak-field deflection of light by mass distributions described by two-power-law densities $\rho(R)=\rho_0 R^{-\alpha}(R+1)^{\beta-\alpha}$, where $\alpha$ and $\beta$ are non-negative integers.
Karlo Nepomuceno de Leon, I. Vega
semanticscholar +1 more source
Inner structure of Gauss-Bonnet-Chern Theorem and the Morse theory
, 2001 We define a new one form H^A based on the second fundamental tensor H^abA, the Gauss-Bonnet-Chern form can be novelly expressed with this one-form. Using the phi-mapping theory we find that the Gauss-Bonnet-Chern density can be expressed in terms of the ...
Duan, Yi-shi, Zhang, Peng-ming
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On the Chern-Gauss-Bonnet Theorem and Conformally Twisted Spectral Triples for $C^*$-Dynamical Systems [PDF]
, 2016 The analog of the Chern-Gauss-Bonnet theorem is studied for a $C^*$-dynamical system consisting of a $C^*$-algebra $A$ equipped with an ergodic action of a compact Lie group $G$. The structure of the Lie algebra $\mathfrak{g}$ of $G$ is used to interpret
Fathizadeh, Farzad, Gabriel, Olivier
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European Physical Journal C: Particles and Fields, 2020 Recently, a novel four-dimensional Einstein–Gauss–Bonnet (EGB) theory was presented to bypass the Lovelock’s theorem and to give nontrivial effects on the four-dimensional local gravity.
Zi-Chao Lin +4 more
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Radiating black hole solutions in Einstein-Gauss-Bonnet gravity
, 2005 In this paper, we find some new exact solutions to the Einstein-Gauss-Bonnet equations. First, we prove a theorem which allows us to find a large family of solutions to the Einstein-Gauss-Bonnet gravity in $n$-dimensions.
Alfredo E. Dominguez +7 more
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Light deflection by Damour-Solodukhin wormholes and Gauss-Bonnet theorem
Physical Review D, 2018 In this paper, using the recent method proposed by Ono, Ishihara and Asada (OIA) who extend the idea of Gibbons and Werner to the stationary and axisymmetric case, we apply the Gauss-Bonnet theorem to the optical metric of the non-rotating and rotating ...
A. Övgün
semanticscholar +1 more source