Mainz 2026 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 41: Interaction with Strong or Short Laser Pulses II

A 41.5: Vortrag

Freitag, 6. März 2026, 12:15–12:30, N 2

Optimizing the incident electron momentum for resonant three-photon Kapitza-Dirac scattering in bichromatic laser fields — •Ingo Elsner and Carsten Müller — Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf

Spin dynamics in Kapitza-Dirac scattering of electrons from counterpropagating bichromatic X-ray laser waves is studied theoretically in the resonant Bragg regime [1]. We show that the intrinsic field-induced detuning, which arises in the Rabi oscillation dynamics between initial and scattering electron state, can be compensated by a suitable adjustment of its incident momentum. Analytical formulas of the optimized electron momentum for spin-dependent three-photon Kapitza-Dirac scattering are obtained from simplified model systems in reduced dimensionality.

[1] Ingo Elsner and Carsten Müller, Phys. Rev. A 112, 032215 (2025).

Keywords: Kapitza-Dirac effect; Spin dynamics; Intense X-ray laser fields; Detuned Rabi oscillations