Comments on the vacuum energy decay

Details Comments on the vacuum energy decay Comments on the vacuum energy decay

2010-04-27

arxiv.org/abs/1004.4867v4

JCAP 1011 (2010) 043

Physics

High Energy Physics

High Energy Physics - Theory

25 pages, 1 figures; significant changes; added content from another preprint

Scientific paper

The {\em instability of vacuum energy} in de Sitter space as discussed recently by Polyakov is argued to be a generic feature when external gravitational fields are present. It is related to the existence of {\em forbidden} (by momentum conservation) decays derived in some detail by Bros, Epstein and Moschella. Some calculations are discussed in a conformally invariant setting, and a flat space model is presented.

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