Gravitational instability in oscillating background
classification
🌀 gr-qc
astro-ph.CO
keywords
backgroundinstabilityperturbationsadditionamplificationantifrictionassociatedconsidered
read the original abstract
Evolution of density and metric perturbations in the background of high frequency oscillations of curvature in F(R) gravity is considered. In addition to the usual Jeans-like instability new effects of amplification of perturbations, associated with parametric resonance and antifriction phenomena, are found.
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