Recorded 11 April 2022. Benjamin Schlein of the University of Zurich presents "Correlation energy of weakly interacting fermions" at IPAM's Model Reduction in Quantum Mechanics Workshop. Abstract: We consider fermionic systems in a joint mean field and semiclassical limit. We show how bosonic Bogoliubov theory can be used to describe corrections to the predictions of Hartree-Fock theory and to derive a formula, due to Gell-Mann and Brueckner, for the correlation energy. The talk is based on joint works with N. Benedikter, P.T. Nam, M. Porta and R. Seiringer. Learn more online at: http://www.ipam.ucla.edu/programs/workshops/workshop-ii-model-reduction-in-quantum-mechanics/?tab=schedule