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  • Title: Real-time dynamics of single vortex lines and vortex dipoles in a Bose-Einstein condensate.
    Author: Freilich DV, Bianchi DM, Kaufman AM, Langin TK, Hall DS.
    Journal: Science; 2010 Sep 03; 329(5996):1182-5. PubMed ID: 20813949.
    Abstract:
    Understanding the behavior of quantized vortices is essential to gaining insight into diverse superfluid phenomena, from critical-current densities in superconductors to quantum turbulence in superfluids. We observe the real-time dynamics of quantized vortices in trapped dilute-gas Bose-Einstein condensates by repeatedly imaging the vortex cores. The precession frequency of a single vortex is measured by explicitly observing its time dependence and is found to be in good agreement with theory. We further characterize the dynamics of vortex dipoles in two distinct configurations: (i) an asymmetric configuration, in which the vortex trajectories are dynamic and nontrivial, and (ii) a stable, symmetric configuration, in which the dipole is stationary.
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