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09.02.21 - IRTG Seminar: Stephan Kümmel, BPI Bayreuth

Prof. Dr. Stephan Kümmel, Department of Physics, University of Bayreuth
When Feb 09, 2021
from 06:00 PM to 07:00 PM
Contact Name
Contact Phone 97666
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Studying energy- and charge transfer processes in real-time:
A density functional perspective

The interaction of light with condensed matter systems governs many different physical processes, ranging from hallmark quantum mechanical effects such as photoemission up to the process of photosynthesis in natural light harvesting systems. Energy- and chargetransfer steps are decisive in such processes. In this talk we take a look at how such processes can be simulated from first principles in real time with Time-Dependent Density Functional Theory. We will see that one can follow the time evolution of the electron density through space and thus, e.g., understand how the polarization of light shapes photoemission signals, and how energy is transferred between the chromophores in the light-harvesting apparatus of photosynthetic bacteria. However, we will also need to take a look at the intricacies that come along with a density-based description of quantum mechanics and the related quest for the proper balance between computational effort and