Results 11 to 20 of about 26,635,104 (298)
Wormholes in the f(R,L,T) theory of gravity [PDF]
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 ...
Ky, Nguyen Anh +2 more
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Exact solutions in F(R) theory of gravity [PDF]
General Relativity and Gravitation, 2016 We find a new method for looking for the static and spherically symmetric solutions in F(R) theory of gravity. With this method, a number of new solutions in terms of the analytic functions are obtained.
Shen, You-Gen, Gao, Changjun
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Cartan $F(R)$ Gravity and Equivalent Scalar-Tensor Theory [PDF]
Symmetry, 2022 We investigate the Cartan formalism in $F(R)$ gravity. $F(R)$ gravity has been introduced as a theory to explain cosmological accelerated expansion by replacing the Ricci scalar $R$ in the Einstein-Hilbert action with a function of $R$. As is well-known,
Inagaki, Tomohiro +3 more
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Physical attributes of polytropic structures in $$\mathbb {F}(R)$$ F ( R ) theory of gravity
European Physical Journal C: Particles and FieldsThe aim of this work is to study the general formalism and applications of polytropic stars within the framework of a well-famed modified theory of gravity namely $$\mathbb {F}(R)$$ F ( R ) theory.
Tayyaba Naz +4 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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The post-Newtonian limit of hybrid f(R)-gravity
EPJ Web of Conferences, 2018 The post-Newtonian formalism is developed for hybrid f(R)-gravity. The model is tested in the weak field regime of the Solar System. Using scalartensor representation of hybrid f(R)-gravity we impose restrictions on the parameters of the theory and show ...
Dyadina Polina, Labazova Sofya
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f(R) gravity solutions for evolving wormholes
European Physical Journal C: Particles and Fields, 2017 The scalar–tensor f(R) theory of gravity is considered in the framework of a simple inhomogeneous space-time model. In this research we use the reconstruction technique to look for possible evolving wormhole solutions within viable f(R) gravity formalism.
Subhra Bhattacharya, Subenoy Chakraborty
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Kinetic scalar curvature extended f(R) gravity
Nuclear Physics B, 2018 In this work we study a modified version of vacuum f(R) gravity with a kinetic term which consists of the first derivatives of the Ricci scalar. We develop the general formalism of this kinetic Ricci modified f(R) gravity and we emphasize on cosmological
S.V. Chervon +4 more
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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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