Journal
PHYSICAL REVIEW D
Volume 96, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.96.123512
Keywords
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Funding
- NASA Astrophysics Theory Grant [NNX17AG48G]
- National Science Foundation [PHY-1414479, PHY-1607611]
- United States Department of Energy Computational Science Graduate Fellowship [DE-FG02-97ER25308]
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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, 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.
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