Semiclassical two-step model with quantum input: Quantum-classical approach to strong-field ionization

Abstract

We present a mixed quantum-classical approach to strong-field ionization - a semiclassical two-step model with quantum input. In this model the initial conditions for classical trajectories that simulate electron wave packet after ionization are determined by the exact quantum dynamics. As a result, the model allows to overcome deficiencies of standard semiclassical approaches in describing the ionization step. The comparison with the exact numerical solution of the time-dependent Schrödinger equation shows that for ionization of a one-dimensional atom the model yields quantitative agreement with the quantum result. This applies both to the width of the photoelectron momentum distribution and the interference structure.

22 pages, 4 figures

References in corpus (3)

• Strong Field Approximation for Systems with Coulomb Interaction
• Instantaneous Multiphoton Ionization Rate and Initial Distribution of Electron Momenta
• Quantum and semiclassical phase-space dynamics of a wave packet in strong fields using initial-value representations

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• Attoscience in Phase Space
• eTraj.jl: Trajectory-Based Simulation for Strong-Field Ionization