[NTU String Seminar] Aspects of Pseudospectra and Black Hole Physics

• Event Date: 2026-05-13
• Chen, Jhan Yu 陳詹喻
• High Energy Physics and Astrophysics High energy theory
• Speaker: Karl Landsteiner (IFT, Madrid)  /  Host: Prof. Pei-Ming Ho
  Place: Rm. 815, Dept. of Physics, NTU

Title: [NTU String Seminar] Aspects of Pseudospectra and Black Hole Physics
Speaker: Karl Landsteiner (IFT, Madrid)
Time: 2026/5/13 (Fri.) 14:30
Place: Rm. 815, Dept. of Physics, NTU
 

Abstract

Quasinormal modes are the eigenmodes and eigenfrequencies of black holes. They play a central role in gravitational wave physics and gauge/gravity duality. I will introduce the notion of pseudospectrum and discuss that quasinormal modes are actually spectrally unstable, meaning that small environmental perturbations can alter the spectrum dramatically. This poses questions on the black hole spectroscopy program, e.g. the recent observational results on having identified 3 quasinormal modes of the Kerr spacetime.