Quantum many-body interactions at nanometre scales
First-principles treatment of quantum many-body interactions at nanometre scales is extremely challenging but necessary for understanding the behavior of realistic systems. Interfaces and van der Waals (hetero)structures, hosting long-ranged and non-local correlated states, are notable examples where conventional methods struggle due to the extremely high number of particles that have to be considered. I will present recent developments in predicting electronic excitations using the combination of stochastic computational techniques and diagrammatic many-body theory. This novel formalism enables first-principles predictions of quasiparticle energies for thousands of atoms. Besides introducing the stochastic method’s fundamentals and outlining its prospects, I will present our recent work on capturing multi-quasiparticle excitations and simulating twisted atomically thin bilayers.
Host - Victor Batista
Zoom link (requires login): https://yale.zoom.us/j/97649133568