Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-03-21
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4 pages, 4 figures
Scientific paper
10.1103/PhysRevA.73.033604
The scattering of sound wave perturbations from vortex excitations of Bose-Einstein condensates(BEC) is investigated by numerical integration of the associated Klein-Gordon equation. It is found that, at sufficiently high angular speeds, sound wave-packets can extract a sizeable fraction of the vortex energy through a mechanism of superradiant scattering. It is conjectured that this superradiant regime may be detectable in BEC experiments.
Cherubini Christian
Federici Francesca
Succi Sauro
Tosi Mario P.
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