Scientific Results

Dynamics of a Tunable Superfluid Junction

Year: 2011

Authors: LeBlanc L.J., Bardon A.B., McKeever J., Extavour M.H.T., Jervis D., Thywissen J.H., Piazza F., Smerzi A.

Autors Affiliation: Department of Physics, University of Toronto, 60 St. George, Toronto ON, Canada, M5S 1A7;
INO-CNR, BEC Center, and Dipartimento di Fisica, Via Sommarive 14, 38123 Povo, Trento, Italy

Abstract: We study the population dynamics of a Bose-Einstein condensate in a double-well potential throughout the crossover from Josephson dynamics to hydrodynamics. At barriers higher than the chemical potential, we observe slow oscillations well described by a Josephson model. In the limit of low barriers, the fundamental frequency agrees with a simple hydrodynamic model, but we also observe a second, higher frequency. A full numerical simulation of the Gross-Pitaevskii equation giving the frequencies and amplitudes of the observed modes between these two limits is compared to the data and is used to understand the origin of the higher mode. Implications for trapped matter-wave interferometers are discussed.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 106 (2)      Pages from: 025302  to: 025302

KeyWords: condensazione di bose-einstein; josephson junction;
DOI: 10.1103/PhysRevLett.106.025302

Citations: 79
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English