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- W3034361365 abstract "We develop a time-dependent perturbation theory (PT) beyond the dipole approximation to analyze the two-photon ionization dynamics of atoms exposed to short laser pulses with an arbitrary polarization. In a wide range of laser parameters, the good performance of the PT method is validated by comparing the results of a number of physical quantities with those calculated by numerically solving the time-dependent Schrodinger equation beyond the dipole approximation. Subsequent applications of the PT method in the nonresonant regime allow us to unveil the important role of the interferences between the dipole and nondipole transition pathways to the photoelectron momentum shift along the laser-propagation direction. In particular, we find that the ratio of the probability of each dipole transition channel to the total ionization probability oscillates with the increase of the photon energy. The interferences among different pathways and the oscillatory behavior of the ratios jointly lead to a series of minima in the linear momentum transfer for the case of the linear polarization." @default.
- W3034361365 created "2020-06-19" @default.
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- W3034361365 date "2020-01-01" @default.
- W3034361365 modified "2023-09-24" @default.
- W3034361365 title "Time-dependent perturbation theory beyond the dipole approximation for two-photon ionization of atoms" @default.
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- W3034361365 doi "https://doi.org/10.1088/1742-6596/1412/15/152004" @default.
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