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Energy conditions in modified Gauss-Bonnet gravity [PDF]
Physical Review D, 2011 In considering alternative higher-order gravity theories, one is liable to be motivated in pursuing models consistent and inspired by several candidates of a fundamental theory of quantum gravity. Indeed, motivations from string/M-theory predict that scalar field couplings with the Gauss-Bonnet invariant, G, are important in the appearance of non ...
Lobo, FSN +3 more
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Energy conditions in f(G) modified gravity with non-minimal coupling to matter [PDF]
Astrophysics and Space Science, 2011 In this paper we study a model of modified gravity with non-minimal coupling between a general function of the Gauss-Bonnet invariant, $f(G)$, and matter Lagrangian from the point of view of the energy conditions. Such model has been introduced in Ref. [21] for description of early inflation and late-time cosmic acceleration.
Banijamali, A. +2 more
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Wormhole geometries in modified teleparallel gravity and the energy conditions [PDF]
Physical Review D, 2012 In this work, we explore the possibility that static and spherically symmetric traversable wormhole geometries are supported by modified teleparallel gravity or f(T) gravity, where T is the torsion scalar. Considering the field equations with an off-diagonal tetrad, a plethora of asymptotically flat exact solutions are found, that satisfy the weak and ...
Harko, T, Böhmer, CG, Lobo, FSN
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Physical attributes of anisotropic compact stars in f(R, G) gravity [PDF]
European Physical Journal C: Particles and Fields, 2017 Modified gravity is one of the potential candidates to explain the accelerated expansion of the universe. Current study highlights the materialization of anisotropic compact stars in the context of f(R, G) theory of gravity.
M. Farasat Shamir, Saeeda Zia
doaj +4 more sources
Anisotropic Quintessence Strange Stars in f(T) Gravity with Modified Chaplygin Gas
Advances in High Energy Physics, 2018 In this paper, we study the existence of strange star in the background of f(T) modified gravity where T is a scalar torsion. In KB metric space, we derive the equations of motion using anisotropic property within the spherically strange star with ...
Pameli Saha, Ujjal Debnath
doaj +2 more sources
Influence of $$f\,(R)$$ f(R) models on the existence of anisotropic self-gravitating systems
European Physical Journal C: Particles and Fields, 2017 This paper aims to explore some realistic configurations of anisotropic spherical structures in the background of metric f(R) gravity, where R is the Ricci scalar.
Z. Yousaf +3 more
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Probing the existence of the ZTF Casimir wormholes in the framework of f(R) gravity
Nuclear Physics B, 2022 For the spherically symmetric static traversable wormholes, supported by the Casimir energy in f(R)=R+αR2 Quadratic, f(R)=f0Rn power-law Modified Gravity (MOG) theories we investigate energy conditions and dynamical stability of the wormhole solutions ...
Oleksii Sokoliuk +2 more
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Energy Conditions with Interacting Field in f(R) Gravity
East European Journal of Physics, 2023 In the context of current scenario, it is crucial to look beyond Einstein’s theory, which opens the door to certain modified theories of gravity. So, present study is devoted to investigate the various energy conditions, particularly, strong energy ...
Vasudeo Patil +3 more
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Spacetimes Admitting Concircular Curvature Tensor in f(R) Gravity
Frontiers in Physics, 2022 The main object of this paper is to investigate spacetimes admitting concircular curvature tensor in f(R) gravity theory. At first, concircularly flat and concircularly flat perfect fluid spacetimes in fR gravity are studied.
Uday Chand De +5 more
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Estimation of cosmological parameters, stability analysis and energy conditions in viable modified gravity [PDF]
Chinese Journal of Physics, 2020 23 pages, 14 figures, accepted for publication in Chinese Journal of ...
Godani, Nisha, Samanta, Gauranga C.
openaire +2 more sources