Gravitational-wave mediated preheating

Stephon Alexander, Sam Cormack, Antonino Marcianò, Nicolás Yunes

Research output: Contribution to journalArticlepeer-review


We propose a new preheating mechanism through the coupling of the gravitational field to both the inflaton and matter fields, without direct inflaton-matter couplings. The inflaton transfers power to the matter fields through interactions with gravitational waves, which are exponentially enhanced due to an inflation-graviton coupling. One such coupling is the product of the inflaton to the Pontryagin density, as in dynamical Chern-Simons gravity. The energy scales involved are constrained by requiring that preheating happens fast during matter domination.

Original languageEnglish (US)
Pages (from-to)82-86
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - Apr 9 2015
Externally publishedYes


  • Chern-Simons
  • Gravitational waves
  • Preheating

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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