QUANTUM BATTLES 2020
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Day 3: Numeric vs Analytic methods & the Future
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​Two-color methods in strong-field physics

S. Yue, N. Eicke, S. Brennecke, M. Lein

Institute of Theoretical Physics, Leibniz University Hannover, Germany

lein@itp.uni-hannover.de


​Irradiation of atoms or molecules with two-color fields offers a wide range of applications such as the observation of ionization times and the control of high-harmonic generation. I will discuss mainly the observation of ionization times by using a weak probe field in addition to the strong ionizing fundamental field, either via detection of photoelectrons or via high-harmonic emission. An analytical treatment is needed to understand the underlying mechanisms and to set up equations for retrieval of information from the observables. The numerical solution of the time-dependent Schrödinger equation, on the other hand, serves as an exact reference. We find that the polarization and the frequency of the probe field are decisive parameters for setting up a useful scheme. In particular, a high-frequency orthogonal probe field (above three times the fundamental frequency) appears to be a good tool to detect the Coulomb shift of the ionization time.
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  • Home
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