Liouvillian interpolation of the self-energy of cluster dynamical mean-field theories
This research introduces Liouvillian interpolation to fix unphysical artifacts in Cluster DMFT and DCA results. The method interpolates frequency-independent matrix elements of the Liouvillian, which are more local than other functions. This novel scheme guarantees causality and provides superior resolution for features like Fermi arcs in Hubbard models.