Solitonic instabilities in de sitter universes

We present three new exact solutions of the four-dimensional Einstein field equations, that can be interpreted as solitonic perturbations of a vacuum de Sitter spacetime, obtained by means of the inverse scattering technique. The solutions are unstable against this type of perturbations, in spite of...

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Bibliographic Details
Published in:Physics letters. A 1988-02, Vol.127 (2), p.60-64
Main Authors: Díaz, Mario C., Gleiser, Reinaldo J., Pullin, Jorge A.
Format: Article
Language:English
Subjects:
Exact sciences and technology
General relativity and gravitation
Gravity in more than four dimensions, kaluza-klein theory, unified field theories
alternative theories of gravity
Physics
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Summary:We present three new exact solutions of the four-dimensional Einstein field equations, that can be interpreted as solitonic perturbations of a vacuum de Sitter spacetime, obtained by means of the inverse scattering technique. The solutions are unstable against this type of perturbations, in spite of the fact that they arbitrary small for sufficiently early comoving time. One of the metrics has an energy-momentum tensor that satisfies initially the dominant and strong energy condition and may therefore be relevant to the problem of a precise statement of the cosmic no hair conjecture.
ISSN:0375-9601
1873-2429
DOI:10.1016/0375-9601(88)90382-9