Quasiparticle Interaction in the Three-dimensional Uniform Electron Gas

We establish the quasiparticle interaction in the three-dimensional uniform electron gas using a controlled effective field theory approach---the recently developed variational diagrammatic Monte Carlo method. We accurately determine the angle-resolved Landau interaction function as well as the Landau parameters. Several emergent features of the forward-scattering electron interaction on the Fermi surface are identified. In particular, we find that the different scattering channels of two electrons with parallel momenta and opposite spins almost perfectly cancel out, indicating the electrons are nearly asymptotically free in this limit.