不规则轨道产生高次谐波
Irregular orbits generate higher harmonics
摘要：
本文用均匀化半经典传播子计算了原子中高次谐波的光谱，指出高次谐波的产生是一种干涉现象，可以用半经典方法来描述。这可以从与量子谱的良好一致性中得出结论。此外，谱中平台的形成特别是由于不规则的、时间延迟的轨道与没有时间延迟的规则轨道的干扰。这是证明了缺乏高原的人造半经典光谱产生的样本的轨迹，其中不规则的轨迹（只有百分之几）已被丢弃。
英文摘要：
The spectrum of higher harmonics in atoms calculated with a uniformized semiclassical propagator is presented and it is shown that higher harmonic generation is an interference phenomenon which can be described semiclassically. This can be concluded from the good agreement with the quantum spectrum. Moreover, the formation of a plateau in the spectrum is specifically due to the interference of irregular, time delayed, trajectories with regular orbits without a time-delay. This is proven by the absence of the plateau in an artificial semiclassical spectrum generated from a sample of trajectories from which the irregular trajectories (only a few percent) have been discarded.
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