Department of Physics and Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha, China.
Chaos. 2009 Sep;19(3):033129. doi: 10.1063/1.3215764.
We study the effects of chaotic dynamics on atomic tunneling between two weakly coupled Bose-Einstein condensates driven by a double-frequency periodic field. Under the Melnikov's chaos criterion, we divide the parameter space into three parts of different types, regular region, low-chaoticity region, and high-chaoticity region, and give the accurate boundaries between the different regions. It is found that the atomic tunneling can be enhanced in the presence of chaos. Particularly, in the high-chaoticity regions, the chaos-induced inversion of the population imbalance is observed numerically.
我们研究了双频周期场驱动下两个弱耦合玻色-爱因斯坦凝聚体之间原子隧穿的混沌动力学效应。根据梅利尼科夫混沌判据，我们将参数空间划分为规则区域、低混沌区域和高混沌区域三个不同类型的区域，并给出了不同区域之间的精确边界。结果表明，混沌可以增强原子隧穿。特别是，在高混沌区域，我们数值上观察到了混沌引起的粒子数失衡的反转。
