棘齿势中玻色-爱因斯坦凝聚体原子的规则与混沌分布  

Regular and Chaotic Distribution of Bose-Einstein Condensate Atoms with a Ratchet Potential

作　　者：张冬霞[1] 曹飞[1] 李飞[2] 

机构地区：[1]江西渝州科技职业学院新能源工程学院,江西新余338029 [2]湖南科技大学物理学院,湖南湘潭411201

出　　处：《湖南工业大学学报》2012年第4期11-17,共7页Journal of Hunan University of Technology

基　　金：湖南省教育厅科研基金资助项目（08C344）

摘　　要：棘齿势中的玻色-爱因斯坦凝聚系统原子呈现规则与混沌分布,采用等效势法和直接微扰法可得到系统的混沌解。进一步研究BEC原子间非线性相互作用对系统原子分布的影响,得到较强的非线性相互作用可以使系统原子由规则的分布转变为混沌分布的结论。通过数值模拟可得：调节棘齿势强度的大小可以控制BEC原子的规则与混沌分布。Bose-Einstein condensate atoms with a ratchet potential appear regular and chaotic distribution. By using equivalent potential and the direct perturbation method obtains the chaotic solution of the condensed system. Further investigates the influence of the nonlinear interaction between BEC atoms on the distribution of the condensed system, and finds the conclusion that the stronger nonlinear interaction can cause the system atoms from regular distribution transform- ing into chaos distribution. Numerical simulation also reveals that the regular and chaotic distribution of BEC atoms can be controlled by adjusting the ratchet potential strength.

关 键 词：玻色-爱因斯坦凝聚 GROSS-PITAEVSKII方程 棘齿势 混沌 

分 类 号：O415.5[理学—理论物理]