info:eu-repo/semantics/article
Phase slips and vortex dynamics in Josephson oscillations between Bose-Einstein condensates
Fecha
2015-02Registro en:
Abad, M.; Guilleumas, M.; Mayol, R.; Piazza, F.; Jezek, Dora Marta; et al.; Phase slips and vortex dynamics in Josephson oscillations between Bose-Einstein condensates; Europhysics Letters; Europhysics Letters; 109; 4; 2-2015; 400051-400056
0295-5075
CONICET Digital
CONICET
Autor
Abad, M.
Guilleumas, M.
Mayol, R.
Piazza, F.
Jezek, Dora Marta
Smerzi, A.
Resumen
We study the relation between Josephson dynamics and topological excitations in a dilute Bose-Einstein condensate confined in a double-well trap. We show that the phase slips responsible for the self-trapping regime are created by vortex rings entering and annihilating inside the weak-link region or created at the center of the barrier and expanding outside the system. Large amplitude oscillations just before the onset of self-trapping are also strictly connected with the dynamics of vortex rings at the edges of the inter-well barrier. Our results extend and analyze the dynamics of the vortex-induced phase slippages suggested a few decades ago in relation to the "ac" Josephson effect of superconducting and superfluid helium systems.