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Wormholes in the f(R,L,T) theory of gravity
Physics Letters BMorris and Thorne developed wormhole solutions in the late 1980s when they discovered a recipe that wormholes must follow for travelers to cross them safely.
P.H.R.S. Moraes, A.S. Agrawal, B. Mishra
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Testing the \(f(R)\)-theory of Gravity [PDF]
Communications in Physics, 2019 A procedure of testing the \(f(R)\)-theory of gravity is discussed. The latter is an extension of the general theory of relativity (GR). In order this extended theory (in some variant) to be really confirmed as a more precise theory it must be tested. To do that we first have to solve an equation generalizing Einstein's equation in the GR.
Nguyen Anh Ky +2 more
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The phase space of k-Essence f(R) gravity theory
Nuclear Physics B, 2020 Among the remaining viable theories that can successfully describe the late-time era is the k-Essence theory and in this work we study in detail the phase space of k-Essence f(R) gravity in vacuum.
V.K. Oikonomou, N. Chatzarakis
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Analyzing conserved currents in F(R) theory of gravity [PDF]
International Journal of Geometric Methods in Modern Physics, 2021 [Formula: see text] theory of gravity is claimed to admit a host of conserved currents under the imposition of Noether symmetry following various techniques. However, for a constrained system such as gravity, Noether symmetry is not on-shell. As a result, the symmetries do not necessarily satisfy the field equations in general, constraints in ...
Nayem Sk +2 more
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Integral F(R) gravity and saddle point condition as a remedy for the H0-tension
Nuclear Physics B, 2022 In this work, we shall provide an F(R) gravity theoretical framework for solving the H0-tension. Specifically, by exploiting the F(R) gravity correspondence with a scalar-tensor theory, we shall provide a condition in which when it is satisfied, the H0 ...
S. Nojiri, S.D. Odintsov, V.K. Oikonomou
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Thermodynamics of f(R) theories of gravity [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 13 pages, 11 figures.
Peralta, C. D., Jorás, S. E.
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Bounce cosmology in $$f({\mathcal {R}})$$ f ( R ) gravity
European Physical Journal C: Particles and Fields, 2021 In this paper, we analyze the modified $$f({\mathcal {R}})$$ f ( R ) gravity models in Friedmann–Lemaître–Robertson–Walker (FLRW) background. The actions of bouncing cosmology are studied under consideration of different viable models in $$f({\mathcal {R}
M. Ilyas, W. U. Rahman
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On f(R) gravity in scalar–tensor theories [PDF]
International Journal of Geometric Methods in Modern Physics, 2017 We study [Formula: see text] gravity models in the language of scalar–tensor (ST) theories. The correspondence between [Formula: see text] gravity and ST theories is revisited since [Formula: see text] gravity is a subclass of Brans–Dicke models, with a vanishing coupling constant ([Formula: see text]).
Ntahompagaze, Joseph +2 more
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On wormhole throats in f (R) gravity theory [PDF]
General Relativity and Gravitation, 2012 36 pages, 35 figures. Updated version contains some stylistic improvements and added comments. Some typographical errors corrected. More references added.
DeBenedictis, Andrew, Horvat, Dubravko
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Inflation from f(R) theories in gravity’s rainbow [PDF]
The European Physical Journal C, 2020 AbstractIn this work, we study the f(R) models of inflation in the context of gravity’s rainbow theory. We choose three types of f(R) models: $$f(R)=R+\alpha (R/M)^{n},\,f(R)=R+\alpha R^{2}+\beta R^{2}\log (R/M^{2})$$ f ( R )
Areef Waeming, Phongpichit Channuie
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