Dynamics of Symmetry Breaking and Tachyonic Preheating

Details Dynamics of Symmetry Breaking and Tachyonic Preheating Dynamics of Symmetry Breaking and Tachyonic Preheating

2000-12-13

arxiv.org/abs/hep-ph/0012142v1

Phys.Rev.Lett.87:011601,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 6 figures. Higher quality figures and computer generated movies in gif format illustrating our results can be found a

Scientific paper

10.1103/PhysRevLett.87.011601

We reconsider the old problem of the dynamics of spontaneous symmetry breaking using 3d lattice simulations, and develop a theory of tachyonic preheating, which occurs due to the spinodal instability of the scalar field. Tachyonic preheating is so efficient that symmetry breaking typically completes within a single oscillation of the field distribution as it rolls towards the minimum of its effective potential. As an application of this theory we consider preheating in the hybrid inflation scenario, including SUSY-motivated F-term and D-term inflationary models. We show that preheating in hybrid inflation is typically tachyonic and the stage of oscillations of a homogeneous component of the scalar fields driving inflation ends after a single oscillation. Our results may also be relevant for the theory of the formation of disoriented chiral condensates in heavy ion collisions.

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