3 papers
hep-th2025
Quasinormal Modes and the Switchback Effect in Schwarzschild-de Sitter
Mir Mehedi Faruk, Facundo Rost, Jan Pieter van der Schaar
We study the causal structure of Schwarzschild-de Sitter (SdS), including shock wave perturbations, in using reflected null ray trajectories, either through the interior blac…
hep-th2024
Extremal Black Hole Decay in de Sitter Space
Lars Aalsma, Jan Pieter van der Schaar, Manus Visser
The decay of extremal charged black holes has been a useful guidance to derive consistency conditions in quantum gravity. In de Sitter space it has been argued that requiring (extr…
gr-qc2024
Static sphere observers and geodesics in Schwarzschild-de Sitter spacetime
Mir Mehedi Faruk, Edward Morvan, Jan Pieter van der Schaar
We analyze null- and spacelike radial geodesics in Schwarzschild-de Sitter spacetime connecting two conjugate static sphere observers, i.e. free-falling observers at a fixed radius…