Motion of an object through a dilute quantum fluid

Details Motion of an object through a dilute quantum fluid Motion of an object through a dilute quantum fluid

2000-06-08

arxiv.org/abs/cond-mat/0006125v1

Physics

Condensed Matter

6 pages, 3 figures, submitted to Europhysics Letters

Scientific paper

10.1209/epl/i2000-00432-x

We simulate the motion of a massive object through a dilute Bose-Einstein condensate by numerical solution of the non-linear Schr\"odinger equation coupled to an equation of motion for the object. Under a constant applied force, the object accelerates up to a maximum velocity where a vortex ring is formed which slows the object down. If the applied force is less than a critical value, the object becomes trapped within the vortex core. We show that the motion can be described using the time-independent quantum states, and use these states to predict the conditions required for vortex scattering.

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