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

Anthony Aguirre and Matthew C. Johnson
Phys. Rev. D 77, 123536 – Published 25 June 2008

Abstract

We 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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
5 More
  • Received 13 February 2008

DOI:https://doi.org/10.1103/PhysRevD.77.123536

©2008 American Physical Society

Authors & Affiliations

Anthony Aguirre1,* and Matthew C. Johnson2,†

  • 1SCIPP, University of California, Santa Cruz, California 95064, USA
  • 2California Institute of Technology, Pasadena, California 91125, USA

  • *aguirre@scipp.ucsc.edu
  • mjohnson@theory.caltech.edu

See Also

Towards observable signatures of other bubble universes

Anthony Aguirre, Matthew C. Johnson, and Assaf Shomer
Phys. Rev. D 76, 063509 (2007)

Surviving the crash: Assessing the aftermath of cosmic bubble collisions

Anthony Aguirre, Matthew C. Johnson, and Martin Tysanner
Phys. Rev. D 79, 123514 (2009)

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 77, Iss. 12 — 15 June 2008

Reuse & Permissions
Access Options

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×