Atomic population oscillations between two coupled Bose-Einstein condensates with time-dependent nonlinear interaction

作     者：李飞 舒维星 罗海陆 任中洲 

作者机构：Department of Physics Nanjing University Nanjing 210093 China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2007年第16卷第3期

页      面：650-659页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos 10125521 and 10535010) and the Key Development Program for State Basic Research of China (Grant No G2000077400) 

主　　题：Bose-Einstein condensates Melnikov chaotic criterion period doubling macroscopic quantum self-trapping 

摘      要：The atomic population oscillations between two Bose-Einstein condensates with time-dependent nonlinear interaction in a double-well potential are studied. We first analyse the stabilities of the system＇s steady-state solutions. And then in the perturbative regime, the Melnikov chaotic oscillation of atomic population imbalance is investigated and the Melnikov chaotic criterion is obtained. When the system is out of the perturbative regime, numerical calculations reveal that regulating the nonlinear parameter can lead the system to step into chaos via period doubling bifurcations. It is also numerically found that adjusting the nonlinear parameter and asymmetric trap potential can result in the running-phase macroscopic quantum self-trapping （MQST）. In the presence of a weak asymmetric trap potential, there exists the parametric resonance in the system.