Quasinormal mode oscillations in an analogue black hole experiment
arXiv:1811.07858 · doi:10.1103/PhysRevLett.125.011301
Abstract
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.
arXiv commentv3: 7 pages, 4 figures. Shorter paper, with emphasis on the detection of characteristic modes itself instead of the identification of the vortex using the characteristic modes
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