Dynamic wormhole geometries in hybrid metric-Palatini gravity

Abstract

In this work, we analyse the evolution of time-dependent traversable wormhole geometries in a Friedmann-Lemaître-Robertson-Walker background in the context of the scalar-tensor representation of hybrid metric-Palatini gravity. We deduce the energy-momentum profile of the matter threading the wormhole spacetime in terms of the background quantities, the scalar field, the scale factor and the shape function, and find specific wormhole solutions by considering a barotropic equation of state for the background matter. We find that particular cases satisfy the null and weak energy conditions for all times. In addition to the barotropic equation of state, we also explore a specific evolving wormhole spacetime, by imposing a traceless energy-momentum tensor for the matter threading the wormhole and find that this geometry also satisfies the null and weak energy conditions at all times.

9 pages, 6 figures. V2: Discussion and references added; now 11 pages, 6 figures. Accepted for publication in Eur.Phys.J.C

References in corpus (37)

• Dynamics of dark energy
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Cosmology and the Fate of Dilatation Symmetry
• Palatini Approach to Modified Gravity: f(R) Theories and Beyond
• Wormhole geometries in f(R) modified theories of gravity
• Inflationary cosmology in modified gravity theories
• Modified-gravity wormholes without exotic matter
• Solar system and equivalence principle constraints on f(R) gravity by chameleon approach
• Wormholes supported by hybrid metric-Palatini gravity
• Einstein-Gauss-Bonnet traversable wormholes satisfying the weak energy condition
• Thin accretion disks in stationary axisymmetric wormhole spacetimes
• Wormhole geometries supported by a nonminimal curvature-matter coupling
• Nonminimal curvature-matter coupled wormholes with matter satisfying the null energy condition
• Generalized energy conditions in Extended Theories of Gravity
• Warp drive basics
• Electromagnetic signatures of thin accretion disks in wormhole geometries
• A general class of braneworld wormholes
• Cosmology of hybrid metric-Palatini f(X)-gravity
• Can accretion disk properties distinguish gravastars from black holes?
• General relativistic Poynting-Robertson effect to diagnose wormholes existence: static and spherically symmetric case
• Traversable Wormholes Supported by GUP Corrected Casimir Energy
• Evolving wormhole geometries within nonlinear electrodynamics
• Higher-dimensional evolving wormholes satisfying the null energy condition
• Traversable Wormholes in $R+\alpha R^n$ Gravity
• Evolving Lorentzian wormholes supported by phantom matter and cosmological constant
• Hybrid metric-Palatini stars
• Dynamics of Linear Perturbations in the hybrid metric-Palatini gravity
• Unveiling the Dynamics of the Universe
• Cosmological wormholes
• Evolving Lorentzian wormholes supported by phantom matter with constant state parameters
• Thin-shell traversable wormhole crafted from a regular black hole with asymptotically Minkowski core
• Evolving wormhole in the brane-world scenario
• Wormholes in Einstein-scalar-Gauss-Bonnet theories with a scalar self-interaction potential
• Wormhole Structures in Logarithmic-Corrected $R^2$ Gravity
• Traversability of quantum improved wormhole solution
• Role of higher -dimensional evolving wormholes in the formation of a big rip singularity
• Hybrid f(R) theories, local constraints, and cosmic speedup

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