Multiple cosmic collisions and the microwave background power spectrum

  title={Multiple cosmic collisions and the microwave background power spectrum},
  author={Jonathan Kozaczuk and Anthony Aguirre},
  journal={Physical Review D},
Collisions between cosmic bubbles of different vacua are a generic feature of false vacuum eternal inflation scenarios. While previous studies have focused on the consequences of a single collision event in an observer's past, we begin here an investigation of the more general scenario allowing for many "mild" collisions intersecting our past light cone (and one another). We discuss the general features of multiple collision scenarios and consider their impact on the cosmic microwave background… 

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