Josephson effects in dilute Bose-Einstein condensates
Year: 2000
Authors: Giovanazzi S., Smerzi A., Fantoni S.
Autors Affiliation: Ist Nazl Fis Nucl, I-34014 Trieste, Italy; Sch Adv Int Studies, I-34014 Trieste, Italy.
Abstract: We propose an experiment that would demonstrate the de and ac Josephson effects in two weakly linked Bose-Einstein condensates. We consider a time-dependent barrier, moving adiabatically across the trapping potential. The phase dynamics are governed by a driven-pendulum equation, as in current-driven superconducting Josephson junctions. At a critical velocity of the barrier (proportional to the critical tunneling current), there is a sharp transition between the de and ac regimes. The signature is a sudden jump of a large fraction of the relative condensate population. Analytical results are compared with a numerical integration of the Gross-Pitaevskii equation, inn experimentally realistic situation.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 84 (20) Pages from: 4521 to: 4524
KeyWords: Superfluid He-3; Oscillations; Interference; GasDOI: 10.1103/PhysRevLett.84.4521Citations: 136data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)