Solitonic instabilities in de sitter universes

Details Solitonic instabilities in de sitter universes Solitonic instabilities in de sitter universes

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phla..127...60d&link_type=abstract

Physics Letters A, Volume 127, Issue 2, p. 60-64.

Physics

2

Scientific paper

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.

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