Exact vortex nucleation and cooperative vortex tunneling in dilute Bose-Einstein condensates.
Phys Rev Lett
; 101(11): 110401, 2008 Sep 12.
Article
en En
| MEDLINE
| ID: mdl-18851267
With the imminent advent of mesoscopic rotating Bose-Einstein condensates in the lowest Landau level regime, we explore lowest Landau level vortex nucleation. An exact many-body analysis is presented in a weakly elliptical trap for up to 400 particles. Striking non-mean-field features are exposed at filling factors >>1. For example, near the critical rotation frequency pairs of energy levels approach each other with exponential accuracy. A physical interpretation is provided by requantizing a mean-field theory, where 1/N plays the role of Planck's constant, revealing two vortices cooperatively tunneling between classically degenerate energy minima. The tunnel splitting variation is described in terms of frequency, particle number, and ellipticity.
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01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2008
Tipo del documento:
Article
País de afiliación:
Reino Unido
Pais de publicación:
Estados Unidos