Metastability of persistent currents in trapped gases of atoms

Autor:	Karkkainen, K., Christensson, J., Reinisch, G., Kavoulakis, G. M., Reimann, S. M.
Rok vydání:	2007
Předmět:	Condensed Matter - Other Condensed Matter
Zdroj:	Phys. Rev. A 76 (2007) 043627
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.76.043627
Popis:	We examine the conditions that give rise to metastable, persistent currents in a trapped Bose-Einstein condensate. A necessary condition for the stability of persistent currents is that the trapping potential is not a monotonically increasing function of the distance from the trap center. Persistent currents also require that the interatomic interactions are sufficiently strong and repulsive. Finally, any off-center vortex state is shown to be unstable, while a driven gas shows hysteresis. Comment: 7 pages, RevTex, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0709.0405 Zobrazit plný text záznamu View this record from Arxiv