%0 Journal Article
%T Adiabatic Landau-Zener tunnelling in nonlinear three-level system<br>非线性三能级体系的绝热朗道-齐纳隧穿
%A Wang Guan-Fang
%A Liu Bin
%A Fu Li-Bin
%A Zhao Hong
%A <br>王冠芳
%A 刘彬
%A 傅立斌
%A 赵鸿
%J 物理学报
%D 2007
%I 
%X We investigate adiabatic Landau-Zener tunnelling in nonlinear three-level system. The levels and tunnelling probability are studied with respect to the nonlinearity. For weak nonlinearity, the structures of the levels are smooth and similar to their linear counterparts. However the eigenstates of the middle-level will be unstable for some system parameters, which leads to the adiabaticity to break down and the tunnelling probability chaotic. For strong nonlinearity, the structures of the levels are distorted, including double-ring-like distortion in lower-level and butterfly-like distortion in upper-level. The adiabaticity will be broken down more badly. Finally we give a possible application of the system in triple-well trapped Bose-Einstein condensates.
%K three-level
%K Landau-Zener tunnelling
%K tunnelling probability<br>三能级
%K 朗道.齐纳隧穿
%K 隧穿率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=F513371FB4628B48&yid=A732AF04DDA03BB3&vid=014B591DF029732F&iid=DF92D298D3FF1E6E&sid=412B71DDE2E763A0&eid=CE3FC6006B5F4403&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=40