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Squeezed Quasinormal Modes from Nonlinear Gravitational Effects
Sreenath K. Manikandan, Frank Wilczek·August 5, 2025
gr-qcQuantum Physics
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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.