Towards observable signatures of other bubble universes II: Exact solutions for thin-wall bubble collisions

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dc.creatorAguirre, Anthony
dc.creatorJohnson, Matthew C
dc.date2007-12-18
dc.date2008-07-22
dc.date.accessioned2026-07-07T11:39:31Z
dc.date.available2026-07-07T11:39:31Z
dc.descriptionWe assess the effects of a collision between two vacuum bubbles in the thin-wall limit. After describing the outcome of a generic collision possessing the expected hyperbolic symmetry, we focus on collisions experienced by a bubble containing positive vacuum energy, which could in principle contain our observable universe. We provide criteria governing whether the post-collision domain wall accelerates towards or away from this "observation" bubble, and discuss the implications for observers located at various positions inside of the bubble. Then, we identify the class of solutions which have minimal impact on the interior of the observation bubble, and derive a simple formula for the energy density of a shell of radiation emitted from such a collision. In the context of a universe undergoing false vacuum eternal inflation, these solutions are perhaps the most promising candidates for collisions that could exist within our past light cone, and therefore in principle be observable.
dc.description18 PRD-style pages, 12 figures. Added appendix on the expected number of collisions, added references, minor correction to Appendix C, conclusions unchanged. Replaced to match published version
dc.identifierhttps://arxiv.org/abs/0712.3038
dc.identifierhttp://arxiv.org/abs/0712.3038
dc.identifierPhys.Rev.D77:123536,2008
dc.identifierdoi:10.1103/PhysRevD.77.123536
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/199947
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleTowards observable signatures of other bubble universes II: Exact solutions for thin-wall bubble collisions
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