A dipolar self-induced bosonic Josephson junction

Details A dipolar self-induced bosonic Josephson junction A dipolar self-induced bosonic Josephson junction

2010-11-23

arxiv.org/abs/1011.5177v2

EPL 94, 10004 (2011)

Physics

Condensed Matter

Quantum Gases

Major changes. Accepted for publication in EPL

Scientific paper

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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