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Smooth metrics can hide thin shells

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arxiv 2308.11885 v2 pith:FZG6V4RN submitted 2023-08-23 gr-qc

Justin C. Feng This is my paper · ORCID
classification gr-qc
keywords componentsmetricmetricsshellssmooththinappearclass
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In this note, I consider a class of metric tensors with smooth components that naively appear to describe dynamical wormholes with vanishing spacetime curvature. I point out that the smoothness of the metric tensor components is deceptive, and that in general relativity, such metrics must be sourced by exotic thin shells.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Black bounce sourced by non-minimally coupled linear electrodynamics and a canonical scalar field through a thin shell at the throat

    gr-qc 2026-08 conditional novelty 4.0 of 10

    A new family of black bounce and wormhole solutions in general relativity is constructed from a canonical scalar field non-minimally coupled to linear electrodynamics, with the required energy-condition violation conf...

  2. Big Bang as spacetime defect

    gr-qc 2024-12 conditional novelty 2.0 of 10

    The Big Bang singularity is replaced by a degenerate-metric spacelike defect, yielding a smooth bounce with finite curvature and a second world on the other side.

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