On ``nothing'' as an infinitely negatively curved spacetime

@article{Brown2012OnA,
  title={On ``nothing'' as an infinitely negatively curved spacetime},
  author={Adam R. Brown and A. J. Dahlen},
  journal={Physical Review D},
  year={2012},
  volume={85},
  pages={104026}
}
Nothing—the absence of spacetime—can be either an endpoint of tunneling, as in the bubble of nothing, or a starting point for tunneling, as in the quantum creation of a universe. We argue that these two tunnelings can be treated within a unified framework, and that, in both cases, nothing should be thought of as the limit of anti-de Sitter space in which the curvature length approaches zero. To study nothing, we study decays in models with perturbatively stabilized extra dimensions, which admit… 
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