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PLV: Plenarvorträge

PLV XV

PLV XV: Plenarvortrag

Freitag, 16. März 2018, 08:30–09:15, H 0105

How photons change the properties of matter: QED-TDDFT an ab initio framework for modeling Light-Matter interaction — •Angel Rubio — Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761 Hamburg, Germany — Center for Computational Quantum Physics (CCQ), The Flatiron Institute, 162 Fifth avenue, New York NY 10010, USA --- Laureate of the Max-Born-Prize

Computer simulations that predict the light-induced change in the physical and chemical properties of complex systems, molecules, nanostructures and solids usually ignore the quantum nature of light. Recent experiments at the interface between materials science and quantum optics have uncovered situations where both the molecular system and the photon field have to be treated in detail. In this talk, we show how the effects of quantum-photons can be properly included in the newly developed quantum electrodynamics density-functional formalism (QED-TDDFT). We provide an overview of how well-established concepts in the fields of quantum chemistry and material sciences have to be adapted when the quantum nature of light becomes important in correlated matter-photon problems. We identify fundamental changes in Born-Oppenheimer surfaces, conical intersections, spectroscopic quantities, and quantum control efficiency. We also show how periodic driving of many-body systems allow to design Floquet states of matter with tunable electronic properties on ultrafast time scales.

Work done in collaboration with: H. Appel, M. Ruggenthaler, H, Hübener, U. de Giovannini, M. Sentef, N. Park, J. Flick, C. Schaefer, V. Rokaj, D. Welakuh