Macroscopic oscillations between two weakly coupled Bose-Einstein condensates

Year: 2003

Authors: Smerzi A., Tombettoni A., Lopez-Arias T., Fort C., Maddaloni P., Minardi F., Inguscio M.

Autors Affiliation: Istituto Nazionale di Fisica della Materia, Italy; International School for Advanced Studies (SISSA), via Beirut 2/4, 34014 Trieste, Italy; European Laboratory for Non-Linear Spectroscopy (LENS), Largo E. Fermi 2, 50125 Firenze, Italy

Abstract: We demonstrate, both from a theoretical and an experimental point of view, the possibility of realizing a weak coupling between two Bose-Einstein condensates trapped in different Zeeman states. The weak coupling drives macroscopic quantum oscillations between the condensate populations and the observed current-phase dynamics is described by generalized Josephson equations. In order to highlight the superfluid nature of the oscillations, we investigate the response of a Rb-87 non-condensate (thermal) gas in the same conditions, showing that the thermal oscillations damp more quickly than those of the condensate.

Journal/Review: EUROPEAN PHYSICAL JOURNAL B

Volume: 31 (4)      Pages from: 457  to: 461

KeyWords: Condensation; Electron energy levels; Oscillations, Bose-Einstein condensation; Josephson equation; Macroscopic oscillations; Thermal oscillations, Quantum theory
DOI: 10.1140/epjb/e2003-00055-1

Citations: 23
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