Vortex dynamics in trapped Bose-Einstein condensate

Abstract

We perform numerical simulations of vortex motion in a trapped Bose-Einstein condensate by solving the two-dimensional Gross-Pitaevskii Equation in the presence of a simple phenomenological model of interaction between the condensate and the finite temperature thermal cloud. At zero temperature, the trajectories of a single, off - centred vortex precessing in the condensate, and of a vortex - antivortex pair orbiting within the trap, excite acoustic emission. At finite temperatures the vortices move to the edge of the condensate and vanish. By fitting the finite -temperature trajectories, we relate the phenomenological damping parameter to the friction coefficients $\alpha$ and ${\alpha }^{{}^{\prime }}$, which are used to describe the interaction between quantised vortices and the normal fluid in superfluid helium.

16 pages, 18 figures, published in JLTP

References in corpus (1)

• Dissipative dynamics of superfluid vortices at non-zero temperatures

Cited by in corpus (9)

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• Generation and Decay of Two-Dimensional Quantum Turbulence in a Trapped Bose-Einstein Condensate
• Reconnection of superfluid vortex bundles
• Evolution and dynamical properties of Bose-Einstein condensate dark matter stars
• Vortex reconnections in atomic condensates at finite temperature
• Numerical simulation code for self-gravitating Bose-Einstein condensates
• Evolution of the excited electron bubble in liquid 4He and the appearance of fission-like processes
• Dynamics of the corotating vortices in dipolar Bose-Einstein condensates in the presence of dissipation
• Disordered vortex arrays in a two-dimensional condensate