Work

Pole skipping, avoided crossing, and resonant excitation in Kerr quasinormal modes near algebraically special frequencies

Year: 2026

Type: article

Abstract: Kerr quasinormal modes near algebraically special frequencies exhibit anomalous behavior, including apparent bifurcation, disappearance, and a nonsmooth connection to the Schwarzschild limit, which has remained puzzling for decades. Tracking poles and zeros of Green-function building blocks across different Riemann sheets, we show that the bifurcation is due to an avoided crossing accompanied by resonant excitation, while the disappearance is due to pole skipping caused by cancellation of a quasinormal-mode pole by a Matsubara-mode zero. This resolves the physical origin of these long-standing anomalies.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/29n2-dsmr

Authors: Kei-ichiro Kubota, Hayato Motohashi

Institutions: Institute for Cosmic Ray Research, Yukawa Institute for Theoretical Physics, Tokyo Metropolitan University

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

OpenAlex ID: W7161724647

FWCI:

Cites: 67

Cited by:

Related to: 10