Ghost Condensation and Gravity in Higgs Phase

Details Ghost Condensation and Gravity in Higgs Phase Ghost Condensation and Gravity in Higgs Phase

2005-05-10

arxiv.org/abs/hep-th/0505080v1

Proceedings of the 14th Workshop on General Relativity and Gravitation (2005)

Physics

High Energy Physics

High Energy Physics - Theory

4 pages. Talk given at JGRG 14. This complements the final version of hep-th/0502189

Scientific paper

A tachyon is considered to be sick in the context of particle mechanics, but in field theory just indicates instability of a background. We consider a similar possibility that a ghost in field theory might be just an indication of instability of a background and that it can condense to form a different background around which there is no ghost. We construct a low energy effective field theory based on the derivative expansion around the stable background. Possible applications are discussed, including dark energy, dark matter, inflation and black hole.

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