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.
Rok vydání:	2012
Předmět:	Condensed Matter - Quantum Gases
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
Externí odkaz:	http://arxiv.org/abs/1208.4421 Zobrazit plný text záznamu View this record from Arxiv