Routing (electronic design automation)

Quantum mechanics

Quasinormal mode

Gravitation

Social psychology

Astrophysics

Rotating black hole

Operating system

Vortex

Computer science

Classical mechanics

Filter (signal processing)

Computer network

Routing protocol

Physics

Psychology

Ringing

Quantum electrodynamics

Angular momentum

Relaxation (psychology)

Link-state routing protocol

Black hole (networking)

Mechanics

Accretion (finance)

Non-equilibrium thermodynamics

Mode (computer interface)

Spin-flip

Computer vision

Physical Review Letters

The late stages of the relaxation process of a black hole are expected to depend only on its mass and angular momentum and not on the details of its formation process. Inspired by recent analogue gravity experiments, which demonstrate that certain black hole processes take place in gravitational and hydrodynamical systems alike, we conduct an experiment to search for quasinormal mode oscillations of the free surface of a hydrodynamical vortex flow. Our results demonstrate the occurrence and hint at the ubiquity of quasinormal ringing in nonequilibrium analog black hole experiments.

Quasinormal Mode Oscillations in an Analogue Black Hole Experiment