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In this work we show the existence of traversable wormhole and time-machine solutions in a modified theory of gravity where matter and curvature are nonminimally coupled. Those solutions present a nontrivial redshift function and exist even…

高能物理 - 理论 · 物理学 2013-10-24 Orfeu Bertolami , Ricardo Zambujal Ferreira

In this work, spherically symmetric thin-shell wormholes with a conformally invariant Maxwell field for $N$-dimensional $F(R)$ gravity and constant scalar curvature $R$ are built. Two cases are considered: symmetric wormholes and asymmetric…

广义相对论与量子宇宙学 · 物理学 2023-07-13 Griselda Figueroa-Aguirre

In this paper, we analyze static traversable wormholes via Noether symmetry technique in modified Gauss-Bonnet $f(\mathcal{G})$ theory of gravity (where $\mathcal{G}$ represents Gauss-Bonnet term). We assume isotropic matter configuration…

广义相对论与量子宇宙学 · 物理学 2020-09-03 M. Sharif , Iqra Nawazish , Shahid Hussain

We present a wormhole construction in the framework of the $f(R,T)$ extended gravity theory, with $R$ being the Ricci curvature scalar and $T$ the trace of the energy-momentum tensor, in the case in which the energy-momentum tensor is…

广义相对论与量子宇宙学 · 物理学 2024-10-07 Marcelo Montenegro Lapola

We consider the equations of motion of an anisotropic space-time in $f(T)$ theory, where $T$ is the torsion. New spherically symmetric solutions of black holes and wormholes are obtained with a constant torsion and the cases for which the…

宇宙学与河外天体物理 · 物理学 2015-05-30 M. Hamani Daouda , Manuel E. Rodrigues , M. J. S. Houndjo

We investigate wormhole solutions using the modified gravity model $f(Q,T)$ with viscosity and aim to find a solution for the existence of wormholes mathematically without violating the energy conditions. We show that there is no need to…

广义相对论与量子宇宙学 · 物理学 2024-10-08 S. Davood Sadatian , S. Mohamad Reza Hosseini

Within the framework of $F(R)$ theories of gravity with (2+1)-dimensions and constant scalar curvature $R$, we construct a family of thin-shell wormholes with circular symmetry and we analyze the stability of the static configurations under…

广义相对论与量子宇宙学 · 物理学 2023-01-31 Cecilia Bejarano , Ernesto F. Eiroa , Griselda Figueroa-Aguirre

In this paper, we derive some new exact solutions of static wormholes in f(T) gravity. We discuss independent cases of the pressure components including isotropic and anisotropic pressure. Lastly we consider radial pressure satisfying a…

广义相对论与量子宇宙学 · 物理学 2013-01-22 Mubasher Jamil , Davood Momeni , Ratbay Myrzakulov

This article explores wormhole solutions within the framework of Finsler geometry and the modified gravity theory. Modifications in gravitational theories, such as $f(\mathcal{R}, \mathcal{T})$ gravity, propose alternatives that potentially…

广义相对论与量子宇宙学 · 物理学 2024-07-11 Yashwanth B. R. , Narasimhamurthy S. K. , Z. Nekouee

We obtain traversable wormhole and time machine solutions of the field equations of an alternative of gravity with non-minimally curvature-matter coupling. Our solutions exhibit a non-trivial redshift function and allow for matter that…

广义相对论与量子宇宙学 · 物理学 2013-05-30 Orfeu Bertolami , Ricardo Zambujal Ferreira

Among the several modified/extended gravity paradigms, the concept of antisymmetric connections leading to space-time torsion can be traced back to Cartan. More recently, developments in string theory have suggested the existence of a…

广义相对论与量子宇宙学 · 物理学 2023-06-01 Parangam Goswami , Anshuman Baruah , Atri Deshamukhya

In this paper, we examine static spherically symmetric wormhole solutions in generalized $f(R,\phi)$ gravity. To do this, we consider three different kinds of fluids: anisotropic, barotropic and isotropic. We explore different $f(R,\phi)$…

广义相对论与量子宇宙学 · 物理学 2018-12-19 M. Zubair , Farzana Kousar , Sebastian Bahamonde

Motivated by recent proposals of possible wormhole shape functions, we construct a wormhole shape function by employing the Karmarkar condition for static traversable wormhole geometry. The proposed shape function generates wormhole…

广义相对论与量子宇宙学 · 物理学 2020-12-07 M. Farasat Shamir , I. Fayyaz

Exact solutions of traversable wormholes were recently found under the assumption of spherical symmetry and the existence of a non-static conformal symmetry. In this paper, we verify that in the case of the conformally symmetric spacetimes…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Christian G. Boehmer , Tiberiu Harko , Francisco S. N. Lobo

We investigate traversable wormhole geometries in the framework of $F(T)$ gravity supplemented by a weak de Rham-Gabadadze-Tolley (dRGT) massive term. Using the static and spherically symmetric Morris-Thorne metric, we derive the field and…

广义相对论与量子宇宙学 · 物理学 2025-11-19 Alexandre Landry , Yassine Sekhmani , Sunil K Maurya , Akram Ali , Emmanuel N. Saridakis

In this present article, we explore the physical properties and characteristics of static, spherically symmetric wormholes in the background of Rastall-Rainbow gravity. The Rastall-Rainbow gravity theory has recently been proposed as a…

广义相对论与量子宇宙学 · 物理学 2023-10-12 Anirudh Pradhan , Safiqul Islam , M. Zeyauddin , Ayan Banerjee

This paper investigates static wormhole solutions through Noether symmetry approach in the context of energy-momentum squared gravity. This newly developed proposal resolves the singularity of big-bang and yields feasible cosmological…

广义相对论与量子宇宙学 · 物理学 2021-05-12 M. Sharif , M. Zeeshan Gul

Motivated by recent proposals of possible wormhole existence in galactic halos, we analyse the cosmological evolution of wormhole solutions in modified $f(R)$ gravity. We construct a dynamical wormhole that asymptotically approaches FLRW…

广义相对论与量子宇宙学 · 物理学 2016-08-24 Sebastian Bahamonde , Mubasher Jamil , Petar Pavlovic , Marko Sossich

This work is devoted to the study of analytic wormhole solutions within the framework of $f(R)$ gravity theory. To check the possibility of having wormhole structures satisfying energy conditions, by means of the class I approach the pair…

广义相对论与量子宇宙学 · 物理学 2022-06-09 A. S. Agrawal , B. Mishra , Francisco Tello-Ortiz , A. Alvarez

Extended $f(R)$ theories of gravity have been investigated from the symmetry point of view. We briefly has been investigated Noether symmetry of two types of extended $f(R)$ theories: $f(R,T)$ theory, in which curvature is coupled non…

广义相对论与量子宇宙学 · 物理学 2018-10-09 D. Momeni , R. Myrzakulov , E. Güdekli