Enhancing inflationary tensor modes through spectator fields

Matteo Biagetti, Matteo Fasiello, Antonio Riotto

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Abstract

We show that a large contribution to tensor modes during inflation can be generated by a spectator scalar field with speed of sound lower than unity.
Original languageEnglish
Article number103518
Number of pages5
JournalPhysical Review D
Volume88
DOIs
Publication statusPublished - 13 Nov 2013

Keywords

  • astro-ph.CO
  • gr-qc
  • hep-ph

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