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High‐order harmonic generation by static coherent states method in single‐electron atomic and molecular systems
Author(s) -
Eidi Mohammadreza,
Vafaee Mohsen,
Koochaki Kelardeh Hamed,
Landsman Alexandra
Publication year - 2021
Publication title -
journal of computational chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.907
H-Index - 188
eISSN - 1096-987X
pISSN - 0192-8651
DOI - 10.1002/jcc.26549
Subject(s) - high harmonic generation , physics , laser , electron , polarization (electrochemistry) , attosecond , atomic physics , schrödinger equation , quantum mechanics , computational physics , chemistry , ultrashort pulse
We solve the time‐dependent Schrodinger equation using the coherent states as basis sets for computing high harmonic generation (HHG) in a full‐dimensional single‐electron “realistic” system. We apply the static coherent states (SCS) method to investigate HHG in the hydrogen molecular ion induced by a linearly polarized laser field. We show that SCS gives reasonable agreement compared to the three dimensional unitary split‐operator approach. Next, we study isolated attosecond pulse generation in H 2 + . To do so, we employ the well‐known polarization gating technique, which combines two delayed counter‐rotating circular laser pulses, and opens up a gate at the central portion of the superposed pulse. Our results suggest that the SCS method can be used for full‐dimensional quantum simulation of higher dimensional systems such as the hydrogen molecule in the presence of an external laser field.