Action of Singular Instantons of Hawking-Turok Type

Details Action of Singular Instantons of Hawking-Turok Type Action of Singular Instantons of Hawking-Turok Type

2000-05-11

arxiv.org/abs/hep-th/0005102v1

Phys.Rev. D63 (2001) 043510

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, LaTeX

Scientific paper

10.1103/PhysRevD.63.043510

Using Kaluza-Klein technique we show that the singularity of Hawking-Turok type has a fixed point (bolt) contribution to the action in addition to the usual boundary contribution. Interestingly by adding this contribution we can obtain a simple expression for the total action which is feasible for both regular and singular instantons. Our result casts doubt on the constraint proposed by Turok in the recent calculation in which Vilenkin's instantons are regarded as a limit of certain constrained instantons.

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