Non-Abelian gauge preheating

Peter Adshead, John T. Giblin, Zachary J. Weiner

Research output: Contribution to journalArticlepeer-review


We study preheating in models where a scalar inflaton is directly coupled to a non-Abelian SU(2) gauge field. In particular, we examine m2φ2 inflation with a conformal, dilatonlike coupling to the non-Abelian sector. We describe a numerical scheme that combines lattice gauge theory with standard finite difference methods applied to the scalar field. We show that a significant tachyonic instability allows for efficient preheating, which is parametrically suppressed by increasing the non-Abelian self-coupling. Additionally, we comment on the technical implementation of the evolution scheme and setting initial conditions.

Original languageEnglish (US)
Article number123512
JournalPhysical Review D
Issue number12
StatePublished - Dec 15 2017

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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