Towards observable signatures of other bubble universes
Abstract
We 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.
- Authors:
-
- SCIPP, University of California, Santa Cruz, California 95064 (United States)
- Publication Date:
- OSTI Identifier:
- 21027759
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review. D, Particles Fields
- Additional Journal Information:
- Journal Volume: 76; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.76.063509; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANISOTROPY; BUBBLES; COLLISIONS; COSMOLOGY; DISTRIBUTION; INFLATIONARY UNIVERSE; RELICT RADIATION; UNIVERSE
Citation Formats
Aguirre, Anthony, Johnson, Matthew C, and Shomer, Assaf. Towards observable signatures of other bubble universes. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVD.76.063509.
Aguirre, Anthony, Johnson, Matthew C, & Shomer, Assaf. Towards observable signatures of other bubble universes. United States. https://doi.org/10.1103/PHYSREVD.76.063509
Aguirre, Anthony, Johnson, Matthew C, and Shomer, Assaf. 2007.
"Towards observable signatures of other bubble universes". United States. https://doi.org/10.1103/PHYSREVD.76.063509.
@article{osti_21027759,
title = {Towards observable signatures of other bubble universes},
author = {Aguirre, Anthony and Johnson, Matthew C and Shomer, Assaf},
abstractNote = {We 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.},
doi = {10.1103/PHYSREVD.76.063509},
url = {https://www.osti.gov/biblio/21027759},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 6,
volume = 76,
place = {United States},
year = {Sat Sep 15 00:00:00 EDT 2007},
month = {Sat Sep 15 00:00:00 EDT 2007}
}