Wormholes in exponential $f(R,T)$ gravity

Abstract

Alternative gravity is nowadays an extremely important tool to address some persistent observational issues, such as the dark sector of the universe. They can also be applied to stellar astrophysics, leading to outcomes one step ahead of those obtained through General Relativity. In the present article we test a novel $f(R,T)$ gravity model within the physics and geometry of wormholes. The $f(R,T)$ gravity is a reputed alternative gravity theory in which the Ricci scalar $R$ in the Einstein-Hilbert gravitational lagrangian is replaced by a general function of $R$ and $T$, namely $f(R,T)$, with $T$ representing the trace of the energy-momentum tensor. We propose, for the first time in the literature, an exponential form for the dependence of the theory on $T$. We derive the field equations as well as the non-continuity equation and solve those to wormhole metric and energy-momentum tensor. The importance of applying alternative gravity to wormholes is that through these theories it might be possible to obtain wormhole solutions satisfying the energy conditions, departing from General Relativity well-known outcomes. In this article, we indeed show that it is possible to obtain wormhole solutions satisfying the energy conditions in the exponential $f(R,T)$ gravity. Naturally, there is still a lot to do with this model, as cosmological, galactical and stellar astrophysics applications, and the reader is strongly encouraged to do so, but, anyhow, one can see the present outcomes as a good indicative for the theory.

6 pages, 3 figures, To appear in European Physical Journal C

References in corpus (32)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• f(R,T) gravity
• Wormhole geometries in f(R) modified theories of gravity
• The type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star
• Thermodynamic interpretation of the generalized gravity models with geometry - matter coupling
• Wormholes supported by hybrid metric-Palatini gravity
• Modelling wormholes in $f(R,T)$ gravity
• Can we distinguish between black holes and wormholes by their Einstein-ring systems?
• Generalized energy conditions in Extended Theories of Gravity
• Accelerated expansion from ghost-free bigravity: a statistical analysis with improved generality
• Shadows of rotating wormholes
• I-Love-Q, Spontaneously: Slowly Rotating Neutron Stars in Scalar-Tensor Theories
• Unification of Constant-roll Inflation and Dark Energy with Logarithmic $R^2$-corrected and Exponential $F(R)$ Gravity
• Wormholes in $R^2$-gravity within the $f(R,T)$ formalism
• Cosmological evolution in exponential gravity
• Generalized virial theorem in f(R) gravity
• Stellar equilibrium configurations of white dwarfs in the $f(R,T)$ gravity
• Strange stars in $f(R,\mathcal{T})$ gravity
• Palatini formulation of $f(R,T)$ gravity theory, and its cosmological implications
• Bouncing cosmology in $f(R,T)$ gravity
• Anisotropic strange stars under simplest minimal matter-geometry coupling in the $f(R,\mathcal{T})$ gravity
• Cosmic history of viable exponential gravity: Equation of state oscillations and growth index from inflation to dark energy era
• Distinguishing black holes and wormholes with orbiting hot spots
• A periodic varying deceleration parameter in $f(R,T)$ gravity
• N-dimensional static and evolving Lorentzian wormholes with cosmological constant
• Wormhole with varying cosmological constant
• $f(R,T)=f(R)+\lambda T$ gravity models as alternatives to cosmic acceleration
• Anisotropic cosmological reconstruction in $f(R,T)$ gravity
• Dynamic wormhole solutions in Einstein-Cartan gravity
• Gauss-Bonnet Chameleon Mechanism of Dark Energy
• Dark Energy and Equation of State Oscillations with Collisional Matter Fluid in Exponential Modified Gravity

Cited by in corpus (33)

• Traversable wormhole geometries in $f(Q)$ gravity
• $f(Q,T)$ gravity models with observational constraints
• Traversable wormhole inspired by non-commutative geometries in $f(Q)$ gravity with conformal symmetry
• Static traversable wormhole solutions in $f(R,L_m)$ gravity
• Inflation in $f(R,T)$ Gravity
• Comprehensive Analysis of a Non-Singular Bounce in $f(R,T)$ Gravitation
• Accelerating Universe in Hybrid and Logarithmic Teleparallel Gravity
• Traversable wormhole solutions with non-exotic fluid in framework of $f(Q)$ gravity
• Morris-Thorne Wormholes in $f(R,T)$ modified theory of gravity
• Wormholes in the f(R,L,T) theory of gravity
• Big Bang Nucleosynthesis and Entropy Evolution in $f(R,T)$ Gravity
• Late-Time Viscous Cosmology in $f(R,T)$ Gravity
• Traversable wormholes with logarithmic shape function in f(R, T) gravity
• Dynamical wormholes in Lovelock gravity
• Investigating the Physical Properties of Traversable Wormholes in the Modified $f(R,T)$ Gravity
• Constraining f(R,T) Gravity From The Dark Energy Density Parameter ${\Omega }_{\Lambda }$
• A Complete Cosmological Scenario in Teleparallel Gravity
• Finslerian wormhole solution in the framework of modified gravity
• Search for the $f(R,T)$ gravity functional form via gaussian processes
• The study of Kantowski-Sachs perfect fluid cosmological model in modified gravity
• Novel triple barrier potential for axial gravitational perturbations of a family of Lorentzian wormholes
• Cosmological effects on $f(\bar{R},\bar{T})$ gravity through a non-standard theory
• Collapsing scenarios of K-essence generalized Vaidya spacetime under $f(\bar{R},\bar{T})$ gravity
• Growth of matter fluctuations in $f(R,T)$ Gravity
• Energy Constraints for Evolving Spherical and Hyperbolic Wormholes in $f(R,T)$ Gravity
• Tsallis holographic inflation in $f(R,T)$ gravity: CMB constraints, reheating, and swampland implications
• NEC violation in $f(\bar{R},\bar{T})$ gravity in the context of a non-canonical theory via modified Raychaudhuri equation
• Well behaved class of Heintzmann's solution within $f(R,T)$ framework
• Evolving Wormholes in a Cosmological Background
• Wormholes with matter haunted by conformally coupled ghosts
• Geodesics in Generalised Ellis-Bronnikov Spacetime Embedded in Warped 5D Background
• Study of Wormhole in $f(Q)$ gravity with some dark energy models
• Wormhole Solutions and Pre-inflationary Epoch in $F(R,T)$ Gravity with Axion Fields