Bohmian mechanics to high-order harmonic generation

Abstract

Xuan-Yang(赖炫扬) a)b) , Cai Qing-Yu(蔡庆宇) a) † , and Zhan Ming-Sheng(詹明生) a)c)

Investigation of the generation of high-order harmonics through Bohmian trajectories

“…For particle B, there is a strong harmonic generation at the cutoff; however, the oscillating structure of its harmonic is somewhat different from that obtained by numerically solving TDSE. For particle A, its harmonic structure is identical to that obtained by numerically solving the TDSE, and this is in agreement with the numerical results of Lai et al [13]. One can notice that the spectrum of HHG cannot be accurately described by that of a single trajectory; more Bohmian particles need to be considered for an accurate description.…”

“…Lai et al [11] calculated the spectrum of harmonic generation according to one Bohmian trajectory, and the propagation effects of HHG are considered. The calculated HHG spectra are in qualitative agreement with the result from TDSE [13].…”

“…Therefore, a lot of information is contained in the SFA scheme, but the contribution of excited states to HHG are not taken into account in this scheme. On the premise that the calculation is accurate, the time-dependent Bohmian trajectories are adopted to describe the dynamic process of the interaction between an intense laser and atoms and molecules so as to clearly illustrate the mechanism of HHG [10][11][12][13]. Lai et al [11] calculated the spectrum of harmonic generation according to one Bohmian trajectory, and the propagation effects of HHG are considered.…”