Dynamical Wormhole Definitions Confronted

Abstract

Crude comparison between four alternative proposals for the very definition of a wormhole is provided, all of which were intended to apply to the dynamical cases. An interesting dynamical solution, based upon large scale magnetic fields, is used for the comparisons. Such solution goes beyond the perfect fluid approximation due to an anisotropic pressure component, bringing to the fore some unsuspected features of those definitions. Certain notions as reversible traversability are claimed as a way to select among those definitions the best suited one to represent our intuition of what a wormhole solution is expected to be.

14 pages, 21 figures

References in corpus (4)

• Wormhole dynamics in spherical symmetry
• Cosmological wormholes
• New definition of wormhole throat
• Magnetic fields and the Weyl tensor in the early universe

Cited by in corpus (7)

• Trapping Horizons of the Evolving Charged Wormhole and Black Bounce
• Revisiting black holes and wormholes under Weyl transformations
• Some unusual wormholes in general relativity
• Collapsing Wormholes Sustained by Dustlike Matter
• Evolving Wormholes in a Cosmological Background
• Radiating Spherical Collapse for an Inhomogeneous Interior Solution
• Magnetized dusty black holes and wormholes