Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 17: Ultrakalte Atome I [gemeinsam mit A]

Q 17.5: Talk

Tuesday, March 11, 2008, 15:00–15:15, 2F

Stable dark solitons in three-dimensional dipolar Bose-Einstein condensates — •Rejish Nath¹, Paolo Pedri², and Luis Santos¹ — ¹Institute of Theoretical Physics, Leibniz university of Hannover, Appelstrasse 2, 30167, Hannover, Germany — ²Laboratoire de Physique Théorique de la Matière Condensée, Université Pierre at Marie Curie, case courier 121 , 4 place Jussieu, 75252 Paris Cedex, France

We study the dynamical stability of dark solitons in dipolar Bose-Einstein condensates. In the absence of non-locality due to the dipolar interaction, stationary dark solitons (nodal planes) are unstable against transversal excitations (snake instability) in 2D and 3D. On the contrary, due to its non local character, the dipolar interaction allows for stable 3D stationary dark solitons. We discuss in detail the conditions to achieve this stability, which demand the use of an additional optical lattice.