Geodesic
Phantom dark energy with tachyonic instability: Metric perturbations
Teoretičeskaâ i matematičeskaâ fizika, Tome 173 (2012) no. 3, pp. 441-452 Cet article a éte moissonné depuis la source Math-Net.Ru

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We study the evolution of metric perturbations in a model of UV-stable phantom dark energy. The model has tachyon instabilities at long wavelengths. We find that like the tachyon modes themselves, metric perturbations grow exponentially in time, starting from very small values determined by vacuum fluctuations, and may become sizeable at late times. We derive a constraint on the model parameters that follows from requiring that the metric perturbation amplitudes not be exceedingly large today.
Keywords: phantom, tachyon
Mots-clés : metric perturbation. 
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     author = {A. V. Serghienko and V. A. Rubakov},
     title = {Phantom dark energy with tachyonic instability: {Metric} perturbations},
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     url = {http://geodesic.mathdoc.fr/item/TMF_2012_173_3_a5/}
}
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A. V. Serghienko; V. A. Rubakov. Phantom dark energy with tachyonic instability: Metric perturbations. Teoretičeskaâ i matematičeskaâ fizika, Tome 173 (2012) no. 3, pp. 441-452. http://geodesic.mathdoc.fr/item/TMF_2012_173_3_a5/

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