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First Observational Tests of Eternal Inflation

Feeney, Stephen M. and Johnson, Matthew C. and Mortlock, Daniel J. and Peiris, Hiranya V. (2011) First Observational Tests of Eternal Inflation. Physical Review Letters, 107 (7). Art. No. 071301. ISSN 0031-9007. doi:10.1103/PhysRevLett.107.071301.

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The eternal inflation scenario predicts that our observable Universe resides inside a single bubble embedded in a vast inflating multiverse. We present the first observational tests of eternal inflation, performing a search for cosmological signatures of collisions with other bubble universes in cosmic microwave background data from the WMAP satellite. We conclude that the WMAP 7-year data do not warrant augmenting the cold dark matter model with a cosmological constant with bubble collisions, constraining the average number of detectable bubble collisions on the full sky N̅ _s<1.6 at 68% C.L. Data from the Planck satellite can be used to more definitively test the bubble-collision hypothesis.

Item Type:Article
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Johnson, Matthew C.0000-0002-5099-8185
Additional Information:© 2011 American Physical Society. Received 27 December 2010; revised 12 May 2011; published 8 August 2011. We are grateful to the WMAP Science Team for supplying the end-to-end WMAP simulations. S. M. F. is supported by the Perren Fund. H.V. P. is supported by Marie Curie Grant No. MIRG-CT-2007-203314 from the European Commission and by STFC and the Leverhulme Trust. M. C. J. acknowledges support from the Moore foundation. M. C. J. and H.V. P. thank the Aspen Center for Physics, where this project was initiated. We acknowledge the Legacy Archive for Microwave Background Data Analysis (LAMBDA). Support for LAMBDA is provided by the NASA Office of Space Science.
Group:Caltech Theory
Funding AgencyGrant Number
Marie Curie GrantMIRG-CT-2007-203314
European CommissionUNSPECIFIED
Leverhulme TrustUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
NASA Office of Space ScienceUNSPECIFIED
Issue or Number:7
Classification Code:PACS: 98.80.Es, 98.70.Vc, 98.80.Cq
Record Number:CaltechAUTHORS:20110824-075351216
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Official Citation:First Observational Tests of Eternal Inflation Stephen M. Feeney, Matthew C. Johnson, Daniel J. Mortlock, and Hiranya V. Peiris Published 8 August 2011 (5 pages) 071301
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25000
Deposited By: Ruth Sustaita
Deposited On:24 Aug 2011 15:41
Last Modified:09 Nov 2021 16:28

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