http://arxiv.org/abs/2003.05460
We propose a Euclidean preparation of an asymptotically AdS$_2$ spacetime that contains an inflating dS$_2$ bubble. The setup can be embedded in a four dimensional theory with a Minkowski vacuum and a false vacuum. AdS$_2$ approximates the near horizon geometry of a two-sided near-extremal Reissner-Nordstr\”{o}m black hole, and the two sides can connect to the same Minkowski asymptotics to form a topologically nontrivial wormhole geometry. Likewise, in the false vacuum the near-horizon geometry of near-extremal black holes is approximately dS$_2$ 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. We speculate about the possibility of a brief period of causal connection when light matter fields are present.
M. Mirbabayi
Fri, 8 May 20
38/72
Comments: 16 pages, 5 figures