Dynamics of a tunable superfluid junction.

  title={Dynamics of a tunable superfluid junction.},
  author={Lindsay J. LeBlanc and A. B. Bardon and Jason Mckeever and M. H. T. Extavour and Dylan Jervis and Joseph H. Thywissen and Francesco Piazza and Augusto Smerzi},
  journal={Physical review letters},
  volume={106 2},
We study the population dynamics of a Bose-Einstein condensate in a double-well potential throughout the crossover from Josephson dynamics to hydrodynamics. At barriers higher than the chemical potential, we observe slow oscillations well described by a Josephson model. In the limit of low barriers, the fundamental frequency agrees with a simple hydrodynamic model, but we also observe a second, higher frequency. A full numerical simulation of the Gross-Pitaevskii equation giving the frequencies… 

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Physics and Applications of the Josephson Effect

Weak Superconductivity - Phenomenological Aspects. Microscopic Theory. Magnitude and Temperature Dependence of the Critical Current. ''Small'' Junctions in a Magnetic Field. Large Junctions - Static

When the average value of Z differs from zero, we subtract the averageZ from all values of Z(t). In all experiments

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      We checked this numerically by deforming our trap into a fully harmonic axially symmetric trap, and following the mode frequencies throughout this process