Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 24: Ultra-cold atoms, ions and BEC IV (with Q)

A 24.2: Vortrag

Mittwoch, 20. März 2013, 11:15–11:30, F 428

Density waves in dipolar Bose-Einstein condensates — •Alexandru Nicolin — Horia Hulubei National Institute for Physics and Nuclear Engineering, Magurele, Romania

Density waves in cigar-shaped dipolar Bose-Einstein condensates are analysed by variational means and we show analytically how the dipole-dipole interaction between the atoms generates a roton-maxon excitation spectrum. A simple model is used to derive the effective equations which describe the emergence of the density waves.