String Generated Gravity Models With Cubic Curvature Terms

Bento, M.C.; Bertolami, O.

doi:10.1016/0370-2693(89)91557-8

String Generated Gravity Models With Cubic Curvature Terms

M.C. Bento
(
- Heidelberg U.
)
,
O. Bertolami
(
- Heidelberg U.
)

Jul 7, 1989

7 pages

Published in:

Phys.Lett.B 228 (1989) 348-354

Published: 1989

DOI:

10.1016/0370-2693(89)91557-8

Report number:

HD-THEP-89-7

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Abstract: (Elsevier)

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.

MODEL: STRING
string model: boson
GRAVITATION
STABILITY
FIELD THEORY: ACTION
SYMMETRY: rotation
COSMOLOGICAL CONSTANT

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