Squeezed Quasinormal Modes from Nonlinear Gravitational Effects
Sreenath K. Manikandan, Frank Wilczek
TL;DR
This paper estimates the potential squeezing of gravitational waves caused by nonlinear effects during black hole mergers, predicting about one percent squeezing in the ringdown phase.
Contribution
It introduces a method to estimate gravitational wave squeezing from nonlinear effects in the weakly perturbative regime of black hole mergers.
Findings
Estimated squeezing degree of about 1% in gravitational waves.
Predicted amplitude ratios for higher harmonics in ringdown phase.
Quantitative assessment of nonlinear gravitational effects on wave squeezing.
Abstract
We estimate the degree of squeezing possible in gravitational waves due to nonlinear gravitational effects in the weakly perturbative regime. Using the predicted amplitude ratios for higher harmonic generation in the ringdown phase of a black hole merger event, we estimate the relevant degree of squeezing produced by a Schwarzschild singularity to be of the order of one percent.
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