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arXiv · 1011.5177

A dipolar self-induced bosonic Josephson junction

M. Abad·M. Guilleumas·R. Mayol·M. Pi·D. M. Jezek
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Abstract

We propose a new scheme for observing Josephson oscillations and macroscopic quantum self-trapping phenomena in a toroidally confined Bose-Einstein condensate: a dipolar self-induced Josephson junction. Polarizing the atoms perpendicularly to the trap symmetry axis, an effective ring-shaped, double-well potential is achieved which is induced by the dipolar interaction. By numerically solving the three-dimensional time-dependent Gross-Pitaevskii equation we show that coherent tunneling phenomena such as Josephson oscillations and quantum self-trapping can take place. The dynamics in the self-induced junction can be qualitatively described by a two-mode model taking into account both s-wave and dipolar interactions.

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M. Abad, M. Guilleumas, R. Mayol, M. Pi, D. M. Jezek. 2010-11-23. A dipolar self-induced bosonic Josephson junction. https://doi.org/10.1209/0295-5075%2F94%2F10004

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