Phantom dark energy with tachyonic instability: metric perturbations

Details Phantom dark energy with tachyonic instability: metric perturbations Phantom dark energy with tachyonic instability: metric perturbations

2008-03-21

arxiv.org/abs/0803.3163v1

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, no figures

Scientific paper

We study the behavior of metric perturbations in a recently proposed model of
phantom dark energy with tachyonic instability at long wavelengths. We find
that metric perturbations exponentially grow in time, starting from very small
values determined by vacuum fluctuations, and may become sizeable at late
times. This property may be of interest for phenomenology.

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