Observation of chaotic and regular dynamics in atom-optics billiards
Observation of chaotic and regular dynamics in atom-optics billiards
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DOI：
10.1103/physrevlett.86.1518
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发表时间：
2001-02-19
影响因子：
8.6
通讯作者：
Davidson, N
中科院分区：
文献类型：
--
作者：
Friedman, N;Kaplan, A;Davidson, N
本文报道了在快速扫描激光束作用下，在球台形光学偶极势场中超冷原子的混沌和规则运动的实验观察。为了研究被这种“原子光学”球限制的原子的动力学，我们测量了通过边界上的一个孔被限制的原子数的衰减。一个快速和纯粹的指数衰减，混沌运动的明确标志，被发现毛皮体育场台球，但不是毛皮圆形或椭圆形台球，与理论一致。我们还研究了退相干，速度传播和重力对规则和混沌运动的影响。
We report on experimental observations of chaotic and regular motion of ultracold atoms confined by a billiard-shaped optical dipole potential induced by a rapidly scanning laser beam. To investigate the dynamics of the atoms confined by such an "atom-optics" billiard we measure the decay of thr number of trapped atoms through a hole on the boundary. A fast and purely exponential decay, the clear signature of chaotic motion, is found fur a stadium billiard, but not fur a circular or an elliptical billiard, in agreement with theory. We also investigated the effects of decoherence, velocity spread, and gravity on regular and chaotic motion.