论文标题
由庞加莱轨道拓扑控制的运输在驱动的非均匀晶格气体中
Transport controlled by Poincaré orbit topology in a driven inhomogeneous lattice gas
论文作者
论文摘要
在均匀倾斜和驱动的周期性量子系统中，驱动器和Bloch振荡之间的相互作用控制着传输动力学。在调制的光学晶格中使用量子气，我们通过实验表明，所施加力的不均匀性导致由驱动阶段控制的丰富的新型动力学行为，从自我模拟的BLOCH日志赛到自适应驱动力驱动力梯度驱动力梯度到模拟的单极模式。匹配实验观测到时间依赖性带理论的无拟合参数数值预测，我们表明这些现象可以定量地理解为潜在的不均匀性诱导的相位空间结构的表现，在这种情况下，频道镜的拓扑庞氏菌Orbits的拓扑结构分类可以控制运输动力学。
In periodic quantum systems which are both homogeneously tilted and driven, the interplay between drive and Bloch oscillations controls transport dynamics. Using a quantum gas in a modulated optical lattice, we show experimentally that inhomogeneity of the applied force leads to a rich new variety of dynamical behaviors controlled by the drive phase, from self-parametrically-modulated Bloch epicycles to adaptive driving of transport against a force gradient to modulation-enhanced monopole modes. Matching experimental observations to fit-parameter-free numerical predictions of time-dependent band theory, we show that these phenomena can be quantitatively understood as manifestations of an underlying inhomogeneity-induced phase space structure, in which topological classification of stroboscopic Poincaré orbits controls the transport dynamics.
