Abstract
We propose parabolic wave packets (PWP) as trial functions to solve the time-dependent Schrödinger equation (TDSE) for atomic hydrogen in a short laser pulse. Within the framework of the time-dependent variational principle, the TDSE is transformed into a set of first-order differential equations for the parameters of the wave packets. Thanks to the asymptotic properties of the PWP, the ionization amplitude is expressed in closed form in terms of the wave packets' parameters. The robustness of the method is first validated with a test model with analytical solution and then applied to the ionization process of atomic hydrogen in half- and few-cycle laser pulses. The results compare very well with those obtained with other approaches.
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Acknowledgements
The research is carried out using the equipment of the Shared Facility Center ’Data Center of FEB RAS’ (Khabarovsk, Russia) [31]. The authors express special gratitude to Sergey Malkovsky.
Funding
This work is supported by the Russian Science Foundation (project no. 23-72-01072).
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AZ and SZ contributed to conceptualization; LUA and YP contributed to methodology and writing—review and editing; AZ and DZ contributed to software; SZ and KK contributed to formal analysis and investigation; SZ contributed to writing—original draft preparation. All authors contributed equally to this work. All authors have read and agreed to the published version of the manuscript.
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Zaytsev, A., Zaytseva, D., Zaytsev, S. et al. Parabolic wave packets for time propagation of atomic hydrogen in an electric field of short laser pulses. Eur. Phys. J. Plus 139, 199 (2024). https://doi.org/10.1140/epjp/s13360-024-04989-4
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DOI: https://doi.org/10.1140/epjp/s13360-024-04989-4