高阶量子加速器模的实验观测
Experimental observation of high-order quantum accelerator modes
摘要：
利用一个由自由下落的冷铯原子云组成的系统，由激光的垂直驻波脉冲周期性地踢，我们提出了第一个高阶量子加速器模式的实验观察。这证实了Fishman，Guarneri和Rebuzzini最近的预测[Phys. Rev. Lett. 89，084101（2002）]。我们还展示了如何这些加速器模式可以确定与稳定区域的相空间在一个经典的混沌系统，尽管其内在的量子起源。
英文摘要：
Using a system consisting of a freely falling cloud of cold cesium atoms periodically kicked by pulses from a vertical standing wave of laser light, we present the first experimental observation of high-order quantum accelerator modes. This confirms the recent prediction by Fishman, Guarneri, and Rebuzzini [Phys. Rev. Lett. 89, 084101 (2002)]. We also show how these accelerator modes can be identified with the stable regions of phase space in a classical-like chaotic system, despite their intrinsically quantum origin.
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