Dissipative dynamics of a vortex state in a trapped Bose-condensed gas

Abstract

We discuss dissipative dynamics of a vortex state in a trapped Bose-condensed gas at finite temperature and draw a scenario of decay of this state in a static trap. The interaction of the vortex with the thermal cloud transfers energy from the vortex to the cloud and induces the motion of the vortex core to the border of the condensate. Once the vortex reaches the border, it immediately decays through the creation of excitations. We calculate the characteristic life-time of a vortex state and address the question of how the dissipative dynamics of vortices can be studied experimentally.

4 pages, major corrections in friction coefficients calculation

References in corpus (6)

• Theory of Bose-Einstein condensation in trapped gases
• Creation of Dark Solitons and Vortices in Bose-Einstein Condensates
• Coherent disintegration and stability of vortices in trapped Bose condensate
• Damping of low-energy excitations of a trapped Bose condensate at finite temperatures
• Finite Temperature Perturbation Theory for a Spatially Inhomogeneous Bose-condensed Gas
• Phase diagram of quantized vortices in a trapped Bose-Einstein condensed gas

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