Defect Formation with Bulk Fields

Details Defect Formation with Bulk Fields Defect Formation with Bulk Fields

2006-05-05

arxiv.org/abs/hep-th/0605070v2

Phys.Rev.D74:065003,2006

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, 5 figures, revtex4, 2 appendices added

Scientific paper

10.1103/PhysRevD.74.065003

It has recently been realized that brane-antibrane annihilation (a possible explanation for ending inflation) may result in defect formation, due to the dynamics of the tachyon field. Studies of this possibility have generally ignored the interaction of the brane fields with fields in the bulk; recently it has been argued [1] that interactions with bulk fields suppress or even eliminate defect formation. To investigate the impact of bulk fields on brane defect formation, we construct a toy model that captures the essential features of the tachyon condensation with bulk fields. We study the structure of defects in this toy model, and simulate their formation and evolution on the lattice. We find that, while the energetics and interactions of defects are influenced by the size of the extra dimension and the bulk-brane coupling, the bulk-brane coupling does not prevent the formation of a defect network.

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