Phase-dependent quantum interference between different pathways in bichromatic harmonic generation

• 来源期刊: 中国物理B（英文版）
• 关键词: harmonic pathway quantum interference split-operator pseudo-spectral method
• 年，卷（期）: 2009,（4）
• 页码范围: 1458-1462
• 页数: 5页
• 语种: 英文

摘要

This paper studies the harmonic generation of the hydrogen atom subjected to a collinear bichromatic laser field by numerically solving the time-dependent Schr(o)dinger equation using the split-operator pseudo-spectral method.By adding a frequency variation to the additional field,the contributions of different pathways to particular order harmonic generation can be isolated.The quantum interference pattern between harmonic pathways,which influences the harmonic intensity,is found to be either constructive or destructive with respect to different relative phase of the two field components.Detailed description of up to the 35th-order harmonics and the harmonic pathways for a wide range of field parameters is presented.