Internal Josephson-like tunnelling in two-component Bose--Einstein condensates affected by sign of the atomic interaction and external trapping potential
Xiong Bo(熊波)† and Liu Xun-Xu(刘循序)
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract This paper studies the Josephson-like tunnelling in two-component Bose--Einstein condensates coupled with microwave field, which is in respond to various attractive and repulsive atomic interaction under the various aspect ratio of trapping potential. It is very interesting to find that the dynamic of Josephson-like tunnelling can be controlled from fast damped oscillations to nondamped oscillation, and relative number of atoms changes from asymmetric occupation to symmetric occupation correspondingly.
Received: 02 February 2007
Revised: 02 April 2007
Accepted manuscript online:
PACS:
03.75.Lm
(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
Fund: Project supported by the
National Natural Science Foundation of China (Grant Nos~10474055, 90406017,
10588402 and 60525417), the National Key Basic Research Special
Foundation of China (Grant No~2005CB724508); the STCM of Shanghai,
China (Grant Nos~05PJ14038, 06JC14026 and 04DZ14009).
Cite this article:
Xiong Bo(熊波) and Liu Xun-Xu(刘循序) Internal Josephson-like tunnelling in two-component Bose--Einstein condensates affected by sign of the atomic interaction and external trapping potential 2007 Chinese Physics 16 2578
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