Josephson Current Flowing in Cyclically Coupled Bose-Einstein Condensates

Details Josephson Current Flowing in Cyclically Coupled Bose-Einstein Condensates Josephson Current Flowing in Cyclically Coupled Bose-Einstein Condensates

1999-11-24

arxiv.org/abs/cond-mat/9911389v2

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figure, to be published in Journal of Physical Society of Japan

Scientific paper

10.1143/JPSJ.69.1942

The Josephson effect in cyclically coupled Bose-Einstein condensates is studied theoretically. We analyze the simultaneous Gross-Pitaevskii equations with coupling terms between adjacent condensates. Depending on the initial relative phases between condensates, Josephson current flows cyclically to make a quantized vortex. Reducing the coupling between condensates changes the motion from periodic to chaotic, thus suppressing the cyclic current. The relation to the Kibble-Zurek mechanism is discussed.

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