Anisotropically inflating universes in a scalar-tensor theory

Journal Article · Sat Feb 14 23:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.043001· OSTI ID:21259967

Kao, W F ^[1]; Lin, I -C ^[2]

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1. Institute of Physics, Chiao Tung University, Hsin Chu, Taiwan (China)
2. Department of Physics, Tsing-Hua University, Hsin Chu, Taiwan (China)

We show that a Brans-Dicke model admits some anisotropically inflating solutions which are identical to the solutions found in a higher derivative pure gravity theory. These inflating solutions were shown to break the cosmic no-hair theorem such that they do not approach the de Sitter universe at large times. The stability conditions of these solutions in this scalar-tensor theory are shown explicitly in this paper. It is shown that there exist unstable modes of the anisotropic perturbations. Therefore the inflating solutions are unstable in the scalar-tensor theory.

• OSTI ID: 21259967
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
DE SITTER GROUP
DISTURBANCES
FIELD THEORIES
GRAVITATION
INFLATIONARY UNIVERSE
MATHEMATICAL SOLUTIONS
PERTURBATION THEORY
SCALARS
STABILITY
TENSORS