Volume 52, Number 3, November I 2000
|257 - 263
|01 September 2002
Motion of an object through a quantum fluid
Department of Physics, University of Durham, Rochester Building
South Road, Durham, DH1 3LE, England, UK
Accepted: 15 September 2000
We simulate the motion of a massive object through a dilute Bose-Einstein condensate by numerical solution of the Gross-Pitaevskii 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 follows the time-independent solutions, and use these solutions to predict the conditions required for vortex detachment.
PACS: 03.75.Fi – Phase coherent atomic ensembles; quantum condensation phenomena / 47.37.+q – Hydrodynamic aspects of superfluidity / 67.40.Vs – Vortices and turbulence
© EDP Sciences, 2000
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.