Above-threshold ionization photoelectron spectrum from quantum trajectory - Physics > Atomic PhysicsReport as inadecuate




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Abstract: Many nonlinear quantum phenomena of intense laser-atom physics can beintuitively explained with the concept of trajectory. In this paper, Bohmianmechanics BM is introduced to study a multiphoton process of atomsinteracting with the intense laser field: above-threshold ionization ATI.Quantum trajectory of an atomic electron in intense laser field is obtainedfrom the Bohm-Newton equation first and then the energy of the photoelectron isgained from its trajectory. With energies of an ensemble of photoelectrons, weobtain the ATI spectrum which is consistent with the previous theoretical andexperimental results. Comparing BM with the classical trajectory Monte-Carlomethod, we conclude that quantum potential may play a key role to reproduce thespectrum of ATI. Our work may present a new approach to understanding quantumphenomena in intense laser-atom physics with the image of trajectory.



Author: X. Y. Lai, Q. Y. Cai, M. S. Zhan

Source: https://arxiv.org/







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