TL;DR
This paper explores a cosmological model where our universe is a bubble in a higher-dimensional space, analyzing collision rates with other bubbles and potential observational signatures or catastrophic events.
Contribution
It introduces a model of our universe as a bubble wall in 5D anti-de Sitter space and estimates collision spectra with other bubbles, highlighting observable implications.
Findings
Collision rate is independent of universe age
Small bubble collisions could be detectable
Large bubble collisions could be catastrophic
Abstract
We consider a cosmological model in which our Universe is a spherically symmetric bubble wall in 5-dimensional anti-de Sitter spacetime. We argue that the bubble on which we live will undergo collisions with other similar bubbles and estimate the spectrum of such collisions. The collision rate is found to be independent of the age of our Universe. Collisions with small bubbles provide an experimental signature of this scenario, while collisions with larger bubbles would be catastrophic.
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