Two Interpretations of Thin-shell Instantons
Yao-Chieh Hu2,1*, Dong-han Yeom2, Pisin Chen2,1
1Physics, National Taiwan University, Taipei, Taiwan
2LeCosPA, National Taiwan University, Taipei, Taiwan
* Presenter:Yao-Chieh Hu,
For O(4)-symmetric instantons, such as Coleman-DeLuccia instanton, there are two complementary interpretations on their analytic continuations. One is the usual interpretation, the nothing-to-something interpretation, where the initial and the final hypersurfaces are disconnected by Euclidean manifolds. The other is a rather unusual one, introduced by Brown and Weinberg, the something-to-something interpretation, where the initial and the final hypersurfaces are connected by the Euclidean manifold. Regarding each interpretation, there are pros and cons. Here we consider analytic continuations of thin-shell instantons with SO(3) symmetry. When applying the Farhi-Guth-Guven/Fischler-Morgan-Polchinski tunneling formalism to our problem, we found that the something-to-something interpretation is rather usual, while we can apply the nothing-to-something interpretation for some limited cases. We argue that for both interpretations, we can give the consistent decay rate. As we apply and interpret through the nothing-to-something interpretation, a stationary black hole can tunnel and emit an expanding shell that results a in spacetime without a singularity nor an event horizon.

Keywords: Information Loss Paradox, Black Hole Physics, Instantons