通过主导相互作用哈密顿量的高次谐波谱
High harmonic spectra via dominant interaction Hamiltonians
摘要：
我们制定的占主导地位的相互作用哈密顿量的概念，以获得一个可积的近似动力学的电子暴露于强激光场和原子势导致高次谐波产生。该概念依赖于相空间中的局部信息来在相互作用之间切换。这些信息是由经典的可积轨线提供的，我们从这些轨线构造了一个半经典的波函数。得到的高次谐波谱与精确的量子谱非常一致。原子势和激光耦合相互作用的分离将有助于计算复杂系统的高次谐波谱。
英文摘要：
We formulate the concept of dominant interaction Hamiltonians to obtain an integrable approximation to the dynamics of an electron exposed to a strong laser field and an atomic potential leading to high harmonic generation. The concept relies on local information in phase space to switch between the interactions. This information is provided by classical integrable trajectories from which we construct a semiclassical wave function. The high harmonic spectrum obtained is in excellent agreement with the accurate quantum spectrum. The separation in the atomic potential and laser coupling interactions should facilitate the calculation of high harmonic spectra in complex systems.
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