Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 24: Interaction with strong or short laser pulses I
A 24.4: Vortrag
Mittwoch, 2. März 2016, 11:45–12:00, f303
Two-step semiclassical model with quantum interference — •Nikolay Shvetsov-Shilovski1, Manfred Lein1, Lars Madsen2, Esa Räsänen3, Christoph Lemell4, Joachim Burgdörfer4,6, Diego Arbo5, and Karoly Tökési6 — 1Leibniz Universität Hannover, Hannover, Germany — 2Aarhus University, Aarhus, Denmark — 3Tampere University of Technology, Tampere, Finland — 4Vienna University of Technology, Vienna, Austria — 5Institute for Astronomy and Space Physics, Buenos Aires, Argentina — 6Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen, Hungary
Trajectory-based semiclassical models are widely used in strong-field physics. A recent quantum trajectory Monte-Carlo (QTMC) approach [1] allows to describe interference effects in above-threshold ionization. The QTMC accounts for the Coulomb potential using the first-order semiclassical perturbation theory.
Here we present a two-step semiclassical model with interference (TSMI) for strong-field ionization [2]. The TSMI accounts for the Coulomb potential beyond the semiclassical pertrubation theory. In TSMI the phase associated with every trajectory is calculated using the matrix element of the semiclassical propagator. By comparison with the numerical solution of the time-dependent Schrödinger equation we show that generally the TSMI describes the interference patterns better than the QTMC.
[1] M. Li et al., Phys. Rev. Lett. 112, 113002 (2014).
[2] N. I. Shvetsov-Shilovski et al., in preparation.