Abstract
We have solved numerically the time-dependent Schrödinger equation (TDSE) describing dissociative-ionization of a H2 molecule exposed to intense short-pulse laser light in one dimension. From the time dependent wave function we calculated the total average acceleration of the two electrons and the relative proton acceleration. We find that the general shape of the power spectra of electrons and protons is very similar except that the for the electrons the peaks occur at odd harmonics whereas for protons the peaks occur at even harmonics. The wavelet time-frequency analysis shows that, surprisingly, time profiles of electron and proton accelerations are nearly identical for high harmonics. The wavelet time profiles confirm predictions of the three-step quasi-classical model of harmonic generation by identifying several (up to three) electron return times with high precision.
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Bandrauk, A.D., Chelkowski, S., Lu, H. (2011). Correlated Electron-Nuclear Motion Visualized Using a Wavelet Time-Frequency Analysis. In: Bandrauk, A., Ivanov, M. (eds) Quantum Dynamic Imaging. CRM Series in Mathematical Physics. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9491-2_3
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