Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 41: Quantengase: Dipolare Gase

Q 41.3: Vortrag

Donnerstag, 5. März 2009, 11:00–11:15, Audi-A

Faraday Instability in 2D dipolar Bose-Einstein Condensates — •Rejish Nath Gopinathan Rejani and Luis Santos — Institute of Theoretical Physics, Leibniz University of Hannover

We discuss the Faraday instability (Faraday Patterns) in two dimensional dipolar homogeneous BECs. Faraday instability in BEC is induced by temporally periodically modulating the non-linearities in the system, e.g. the s-wave scattering length, (using Feshbach resonances), the dipole-dipole interaction(by modulating the external field) or the external confinement. The Faraday patterns are significantly modified in the presence of a roton in the Bogoliubov spectrum. This effect can be employed to reveal easily the appearance of a rotonized spectrum in dipolar BECs, in the on-going experiments.