First Observational Tests of Eternal Inflation: Analysis Methods and WMAP 7-Year Results

@article{Feeney2011FirstOT,
  title={First Observational Tests of Eternal Inflation: Analysis Methods and WMAP 7-Year Results},
  author={Stephen M. Feeney and Matthew Camp Johnson and Daniel J. Mortlock and Hiranya V. Peiris},
  journal={Physical Review D},
  year={2011},
  volume={84},
  pages={043507}
}
In the picture of eternal inflation, our observable universe resides inside a single bubble nucleated from an inflating false vacuum. Many of the theories giving rise to eternal inflation predict that we have causal access to collisions with other bubble universes, providing an opportunity to confront these theories with observation. We present the results from the first observational search for the effects of bubble collisions, using cosmic microwave background data from the WMAP satellite… 
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