Quasi-normal mode analysis in BEC acoustic black holes

Details Quasi-normal mode analysis in BEC acoustic black holes Quasi-normal mode analysis in BEC acoustic black holes

2007-01-31

arxiv.org/abs/gr-qc/0701173v1

Phys.Rev.D75:084024,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages, 3 figures

Scientific paper

10.1103/PhysRevD.75.084024

We perform a quasi-normal mode analysis of black hole configurations in Bose-Einstein condensates (BEC). In this analysis we use the full Bogoliubov dispersion relation, not just the hydrodynamic or geometric approximation. We restrict our attention to one-dimensional flows in BEC with step-like discontinuities. For this case we show that in the hydrodynamic approximation quasi-normal modes do not exist. The full dispersion relation, however, allows the existence of quasi-normal modes. Remarkably, the spectrum of these modes is not discrete but continuous.

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