Browse Teach Curate

Quasinormal Modes and Switchback Complexity in Schwarzschild-de Sitter Spacetime

How static-sphere observers at a fixed radius between a black-hole horizon and a cosmological horizon fix the proper-time normalization and reflecting (Dirichlet) boundary conditions of Schwarzschild-de Sitter geometry. How reflected null geodesics yield the eikonal quasinormal-mode spectrum and the 'critical times' of both horizons, and how a pair of energy-canceling shock waves produces the switchback delay in holographic complexity for arbitrary black-hole mass in D>3.

Data Text

Quasinormal Modes and the Switchback Effect in Schwarzschild-de Sitter Mir Mehedi Faruk,a Facundo

Schwarzschild-de Sitter (SdS) spacetime carries both a black-hole horizon and a cosmological horizon. This paper studies its causal structure using 'static-sphere' observers who sit at a fixed radius…