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arXiv · 1708.02944

Non-Abelian gauge preheating

Peter Adshead·John T. Giblin Jr·Zachary J. Weiner
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Abstract

We study preheating in models where a scalar inflaton is directly coupled to a non-Abelian $SU(2)$ gauge field. In particular, we examine $m^2 \phi^2$ inflation with a conformal, dilaton-like 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.

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Peter Adshead, John T. Giblin Jr, Zachary J. Weiner. 2017-08-09. Non-Abelian gauge preheating. https://doi.org/10.1103/physrevd.96.123512

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