Persistent current formation in a high-temperature Bose-Einstein condensate: an experimental test for c-field theory
Autor: | Rooney, S. J., Neely, T. W., Anderson, B. P., Bradley, A. S. |
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Rok vydání: | 2012 |
Předmět: | |
Zdroj: | Phys. Rev. A 88, 063620 (2013) |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevA.88.063620 |
Popis: | Experimental stirring of a toroidally trapped Bose-Einstein condensate at high temperature generates a disordered array of quantum vortices that decays via thermal dissipation to form a macroscopic persistent current [T. W. Neely em et al. arXiv:1204.1102 (2012)]. We perform 3D numerical simulations of the experimental sequence within the Stochastic Projected Gross-Pitaevskii equation using ab initio determined reservoir parameters. We find that both damping and noise are essential for describing the dynamics of the high-temperature Bose field. The theory gives a quantitative account of the formation of a persistent current, with no fitted parameters. Comment: v2: 7 pages, 3 figures, new experimental data and numerical simulations |
Databáze: | arXiv |
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