Gravitational instability in oscillating background
E.V. Arbuzova, A.D. Dolgov, L. Reverberi
TL;DR
This paper investigates how high-frequency curvature oscillations in F(R) gravity influence density and metric perturbations, revealing new amplification effects like parametric resonance and antifriction phenomena.
Contribution
It introduces the analysis of gravitational instability in oscillating backgrounds within F(R) gravity, uncovering novel amplification mechanisms for perturbations.
Findings
Identification of parametric resonance effects
Discovery of antifriction phenomena in perturbation growth
Enhanced understanding of instability mechanisms in F(R) gravity
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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