Uptunneling to de Sitter
arXiv:2003.05460
Abstract
We propose a Euclidean preparation of an asymptotically AdS spacetime that contains an inflating dS bubble. The setup can be embedded in a four dimensional theory with a Minkowski vacuum and a false vacuum. AdS times 2-sphere approximate the near horizon geometry of a near-extremal RN wormhole. Likewise, in the false vacuum the near-horizon geometry of a near-extremal black hole is approximately dS times 2-sphere. We interpret the Euclidean solution as describing the decay of an excitation inside the wormhole to a false vacuum bubble. The result is an inflating region inside a non-traversable asymptotically Minkowski wormhole.
arXiv comment17 pages, 5 figures. V2: JHEP version; speculations about the possibility of causal communication recanted; comments on brane microphysics added; references added