Towards observable signatures of other bubble universes

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dc.creatorAguirre, Anthony
dc.creatorJohnson, Matthew C
dc.creatorShomer, Assaf
dc.date2007-04-26
dc.date2007-07-25
dc.date.accessioned2026-07-07T10:59:46Z
dc.date.available2026-07-07T10:59:46Z
dc.descriptionWe evaluate the possibility of observable effects arising from collisions between vacuum bubbles in a universe undergoing false-vacuum eternal inflation. Contrary to conventional wisdom, we find that under certain assumptions most positions inside a bubble should have access to a large number of collision events. We calculate the expected number and angular size distribution of such collisions on an observer's "sky," finding that for typical observers the distribution is anisotropic and includes many bubbles, each of which will affect the majority of the observer's sky. After a qualitative discussion of the physics involved in collisions between arbitrary bubbles, we evaluate the implications of our results, and outline possible detectable effects. In an optimistic sense, then, the present paper constitutes a first step in an assessment of the possible effects of other bubble universes on the cosmic microwave background and other observables.
dc.description17 PRD-style pages including 13 embedded figures. Minor corrections to figures 4 and 7 and added discussion in Sec. III.E.2 and V
dc.identifierhttps://arxiv.org/abs/0704.3473
dc.identifierhttp://arxiv.org/abs/0704.3473
dc.identifierPhys.Rev.D76:063509,2007
dc.identifierdoi:10.1103/PhysRevD.76.063509
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187515
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleTowards observable signatures of other bubble universes
dc.typetext

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