Stability conditions for the Bianchi type II anisotropically inflating universes

Details Stability conditions for the Bianchi type II anisotropically inflating universes Stability conditions for the Bianchi type II anisotropically inflating universes

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jcap...01..022k&link_type=abstract

Journal of Cosmology and Astroparticle Physics, Issue 01, pp. 022 (2009).

Physics

4

Scientific paper

Stability conditions for a class of anisotropically inflating solutions in the Bianchi type II background space are shown explicitly in this paper. These inflating solutions were known to break the cosmic no-hair theorem such that they do not approach the de Sitter universe at large times. It can be shown that unstable modes of the anisotropic perturbations always exist for this class of expanding solutions. As a result, we show that these set of anisotropically expanding solutions are unstable against anisotropic perturbations in the Bianchi type II space.

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