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Teoreticheskaya i Matematicheskaya Fizika, 2012, Volume 173, Number 3, Pages 441–452
DOI: https://doi.org/10.4213/tmf8333 (Mi tmf8333) 		 
This article is cited in 2 scientific papers (total in 2 papers)

Phantom dark energy with tachyonic instability: Metric perturbations

A. V. Serghienkoabc, V. A. Rubakovcb

a Demidov Yaroslavl State University, Yaroslavl, Russia
b Lomonosov Moscow State University, Moscow, Russia
c Institute for Nuclear Research, RAS, Moscow, Russia
Full-text PDF (487 kB) Citations (2)
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DOI: https://doi.org/10.4213/tmf8333
Abstract: 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, metric perturbation.
Received: 12.03.2012
English version:
Theoretical and Mathematical Physics, 2012, Volume 173, Issue 3, Pages 1709–1719
DOI: https://doi.org/10.1007/s11232-012-0142-2
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: A. V. Serghienko, V. A. Rubakov, “Phantom dark energy with tachyonic instability: Metric perturbations”, TMF, 173:3 (2012), 441–452; Theoret. and Math. Phys., 173:3 (2012), 1709–1719
Citation in format AMSBIB
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    • This publication is cited in the following 2 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    		Теоретическая и математическая физика Theoretical and Mathematical Physics
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