String-generated gravity models with cubic curvature terms

Details String-generated gravity models with cubic curvature terms String-generated gravity models with cubic curvature terms

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phlb..228..348b&link_type=abstract

Physics Letters B, Volume 228, Issue 3, p. 348-354.

Physics

18

Scientific paper

We study solutions to the gravity models which are obtained in the low-energy limit of the bosonic string theory up to order α'2 (cubic curvature terms). We show that these models have flat, de Sitter and anti-de Sitter spaces as solutions but the cosmological branches are unstable. We consider the static spherically symmetric solutions and discuss the effect of an explicit cosmological term on stability.
Supported by Deutsche Forschungsgemeinschaft.

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