标题： 相互作用破坏强混沌和弱混沌中的动力学局域化 显示英文标题

标题： Interactions destroy dynamical localization with strong and weak chaos

摘要： 玻色-爱因斯坦凝聚体加载到受激光学晶格中可以被视为量子受激转子系统。 非相互作用的转子在动量空间中表现出动力学局域化。 实验上可调节的凝聚体相互作用被包含在一个基于二体相互作用的定性 Gross-Pitaevskii 类型模型中。 我们在动量空间中观察到了波包扩散的强混沌和弱混沌区域。 在中间的强混沌区域，凝聚体能量按照$t^{1/2}$增长。 在渐近的弱混沌情况下，增长过渡到$t^{1/3}$法则。 结果不依赖于受激的细节。 显示英文摘要

摘要： Bose-Einstein condensates loaded into kicked optical lattices can be treated as quantum kicked rotor systems. Noninteracting rotors show dynamical localization in momentum space. The experimentally tunable condensate interaction is included in a qualitative Gross-Pitaevskii type model based on two-body interactions. We observe strong and weak chaos regimes of wave packet spreading in momentum space. In the intermediate strong chaos regime the condensate energy grows as $t^{1/2}$. In the asymptotic weak chaos case the growth crosses over into a $t^{1/3}$ law. The results do not depend on the details of the kicking.