On the number of instabilities of cosmological solutions in an Einstein-Yang-Mills system

Details On the number of instabilities of cosmological solutions in an Einstein-Yang-Mills system On the number of instabilities of cosmological solutions in an Einstein-Yang-Mills system

2003-06-13

arxiv.org/abs/hep-th/0306126v2

Phys.Lett.B568:291-297,2003

Physics

High Energy Physics

High Energy Physics - Theory

minor corrections,to appear in Physics Letters B

Scientific paper

10.1016/j.physletb.2003.06.061

A detailed numerical stability analysis of the static, spherically symmetric globally regular solutions of the Einstein-Yang-Mills equations with a positive cosmological constant, Lambda, is carried out. It is found that the number of unstable modes in the even parity sector is n for solutions with n=1,2 nodes as Lambda varies. The solution with n=3 nodes exhibits a rather surprising behaviour in that the number of its unstable modes jumps from 3 to 1 as Lambda crosses (from below) a critical value. In particular the topologically 3-sphere type solution with n=3 nodes has only a single unstable mode.

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