3 papers
gr-qc2026
Vishveshwara's waveform revisited: insights from a Keldysh quasinormal mode expansion
Jérémy Besson, José Luis Jaramillo
We revisit Vishveshwara's linear scattering on a Schwarzschild black hole to study the evolution of quasinormal mode activation along the full time-domain waveform. Specifically, b…
gr-qc2025
Quasi-normal mode expansions of black hole perturbations: a hyperboloidal Keldysh's approach
Jérémy Besson, José Luis Jaramillo
We study quasinormal mode expansions by adopting a Keldysh scheme for the spectral construction of asymptotic resonant expansions. Quasinormal modes are first cast in terms of a no…
physics.optics2024
Discussions on the spatial exponential growth of electromagnetic quasinormal modes
Tong Wu, Jose Luis Jaramillo, Philippe Lalanne
The temporal response of open systems is marked by damped oscillations. These oscillations, often referred to as ringings, are the signature of the decay of quasinormal modes (QNMs…