Quasi-normal mode analysis in BEC acoustic black holes
General Relativity and Quantum Cosmology
2008-11-26 v1
Abstract
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.
Keywords
Cite
@article{arxiv.gr-qc/0701173,
title = {Quasi-normal mode analysis in BEC acoustic black holes},
author = {C. Barcelo and A. Cano and L. J. Garay and G. Jannes},
journal= {arXiv preprint arXiv:gr-qc/0701173},
year = {2008}
}
Comments
7 pages, 3 figures