Cutoff in molecular harmonic-generation spectra resulting from classical chaotic dynamics.

Abstract

The plateau in the harmonic-generation (HG) spectrum of a bound quantum system is first associated with classical chaotic dynamics. The molecular cutoff in the HG spectra was obtained at \ensuremath{\Omega}=m\ensuremath{\omega}, where \ensuremath{\omega} is the frequency of the time-periodic field and m is the area of the bound chaotic region in the phase space divided by 2\ensuremath{\pi}\ensuremath{\Elzxh}.