Phase slips and vortex dynamics in Josephson oscillations between Bose-Einstein condensates
Authors: Abad M., Guilleumas M., Mayol R., Piazza F., Jezek DM., Smerzi A.
Autors Affiliation: Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Univ Barcelona, Fac Fis, Dept Estruct & Constituents Mat, E-08028 Barcelona, Spain; Univ Barcelona, Fac Fis, IN2UB, E-08028 Barcelona, Spain; Tech Univ Munich, D-85748 Garching, Germany; Consejo Nacl Invest Cient & Tecn, IFIBA, RA-1428 Buenos Aires, DF, Argentina; INO CNR, QSTAR, I-50125 Florence, Italy; LENS, I-50125 Florence, Italy
Abstract: 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. Copyright (C) EPLA, 2015
Volume: 109 (4) Pages from: 40005-1 to: 40005-6
KeyWords: Josephson effect; Bose-Einstein condensateDOI: 10.1209/0295-5075/109/40005Citations: 15data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-10References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here