• Corpus ID: 239009694

DBI Inflation and Warped Black Holes

  title={DBI Inflation and Warped Black Holes},
  author={Alexander Yu. Kamenshchik and Alessandro Tronconi and Giovanni Venturi},
We study a possible amplification mechanism for the curvature perturbations generated during inflation by a Dirac-Born-Infeld (DBI) inflaton in the presence of a sharp feature in the warp factor. The large growth resulting in the scalar power spectrum is a consequence of the decreasing speed of sound. We obtain analytical approximate expressions for the relevant dynamical quantities both in the slow roll phase and during the transient phase which leads to the amplification. We finally compare… 

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