ITAMP Special Seminar
Tuesday, June 5, 2018
4:00 PM, CfA, 60 Garden St., B-105
Prof. Jan Rost, Max Planck Institute for the Physics of Complex Systems
“Electron dynamics induced by light pulse derivatives”
Attosecond physics with frequencies in the XUV range can achieve pulse durations which are
comparable with the time scale of the bound orbital the light pulse couples to. This will
give rise to non-adiabatic ionization in which the electron is sensitive to light pulse
derivatives. Hence, a simple Gaussian pulse acts like a double pulse and leads to a
natural pump probe scenario as well a Stueckelberg oscillations. How large the
non-adiabatic effects are depends on the AC Stark shift of the bound orbital. We will
illustrate these effects with a simple model of a negative ion. The phenomena discussed
link the intrinsic time-scale of the particle coupled to an external oscillating field to
its frequency and envelope where the envelope can vary at any time scale provided that the
particle’s time scale is comparable or slower. To demonstrate how general these links are
we conclude by re-interpreting Fermi’s golden rule in the light of the non-adiabatic
ionization perspective.
Student Presentation will begin at 4:00
Guest Presentation will begin at 4:30 PM
Refreshments will be provided.
Samantha Dakoulas
Faculty Assistant to Professors Lukin & Greiner & their groups
Department of Physics
17 Oxford St., Lyman 324A
Cambridge, MA 02138
P. (617) 496-2544
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