Abstract
The theoretical and numerical results on the nonlinear dynamics of an atom in the fields of two counterpropagating radiation beams of different frequencies are presented. Both resonant and nonresonant interaction regimes are investigated. The atom center-of-mass energy dependence on the field amplitudes exhibits the nonlinear threshold effect of reflection of an atom in the interference field. This phenomenon leads to the atom acceleration or deceleration depending on its initial state. This acceleration or deceleration is base of a shock character because of the impact with the moving potential barrier; it occurs at ultrashort distances on the order of radiation field wavelengths. Furthermore, the role of initial conditions is discussed and analyzed numerically.
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Mkrtchian, G.F. Nonlinear interaction of a two-level atom with counterpropagating radiation beams of different frequencies. J. Exp. Theor. Phys. 107, 738–745 (2008). https://doi.org/10.1134/S1063776108110034
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DOI: https://doi.org/10.1134/S1063776108110034