Vortex nucleation in rotating BEC: the role of the boundary condition for the order parameter

Details Vortex nucleation in rotating BEC: the role of the boundary condition for the order parameter Vortex nucleation in rotating BEC: the role of the boundary condition for the order parameter

2006-01-26

arxiv.org/abs/cond-mat/0601605v1

International Journal of Modern Physics B 20, 2147 (2006).

Physics

Condensed Matter

Statistical Mechanics

6 pages, 2 figures

Scientific paper

10.1142/S0217979206034601

We study the process of vortex nucleation in rotating two-dimensional BEC confined in a harmonic trap. We show that, within the Gross-Pitaevskii theory with the boundary condition of vanishing of the order parameter at infinity, topological defects nucleation occurs via the creation of vortex-antivortex pairs far from the cloud center, where the modulus of the order parameter is small. Then, vortices move towards the center of the cloud and antivortices move in the opposite direction but never disappear. We also discuss the role of surface modes in this process.

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