Josephson spectroscopy of a dilute Bose-Einstein condensate in a double-well potential

E. Sakellari; M. Leadbeater; N. J. Kylstra; C. S. Adams

doi:10.1103/physreva.66.033612

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Josephson spectroscopy of a dilute Bose-Einstein condensate in a double-well potential

E. Sakellari·M. Leadbeater·N. J. Kylstra·C. S. Adams

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Abstract

The dynamics of a Bose-Einstein condensate in a double-well potential are analysed in terms of transitions between energy eigenstates. By solving the time-dependent and time-independent Gross-Pitaevskii equation in one dimension, we identify tunnelling resonances associated with level crossings, and determine the critical velocity that characterises the resonance. We test the validity of a non-linear two-state model, and show that for the experimentally interesting case, where the critical velocity is large, the influence of higher-lying states is important.

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E. Sakellari, M. Leadbeater, N. J. Kylstra, C. S. Adams. 2002-04-03. Josephson spectroscopy of a dilute Bose-Einstein condensate in a double-well potential. https://doi.org/10.1103/physreva.66.033612

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