Inner horizon saddles supply the semiclassical correction -exp(A_inner/4G) to near-extremal black-hole entropy and motivate a spectral KSW criterion for well-defined one-loop effects around complex gravitational saddles.
Gravitation and Hamiltonian Structure in Two Space-Time Dimensions
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Coupled intrinsic perturbations of the MSW black hole yield complex quasinormal frequencies with negative imaginary parts confirming stability and non-zero real parts indicating oscillatory behavior, with damping rates decreasing as the central charge parameter increases.
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Inner Horizon Saddles and a Spectral KSW Criterion
Inner horizon saddles supply the semiclassical correction -exp(A_inner/4G) to near-extremal black-hole entropy and motivate a spectral KSW criterion for well-defined one-loop effects around complex gravitational saddles.
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Quasinormal modes of coupled metric-dilaton perturbations in two-dimensional stringy black holes
Coupled intrinsic perturbations of the MSW black hole yield complex quasinormal frequencies with negative imaginary parts confirming stability and non-zero real parts indicating oscillatory behavior, with damping rates decreasing as the central charge parameter increases.