Quantum many-body theories, including diagrammatic perturbation theory and non-perturbative embedding theories, are rigorous and well-developed theories used to describe the physics of many interacting particles in solids. They are typically applied to lattice model systems that capture only the essential degrees of freedom. This talk will summarize recent progress on solving the many-body problem ab-initio, i.e. without adjustable parameters and without the construction of effective low-energy models, using diagrammatic and embedding theories. We will show how algorithmic and computational advances have enabled the adaptation of tools that were previously only available on lattice models to real-materials simulations, and how these simulations now avoid several common uncontrolled approximations. A path towards controlled and adaptive many-body simulations is outlined.
Speaker: Emmanuel Gull (University of Warsaw)
Date & Time: Wednesday, 1st October at 14:00
Location: Aula of the Institute of Physics PAS, Al. Lotników 32/46
Zoom details
Zoom link: [LINK]
Meeting ID: 813 0444 2723
Passcode: 812303
We look forward to seeing you there!
Best regards,
Michał Oszmaniec,
Mikołaj Korzyński,
Patryk Lipka-Bartosik.
