Optical conductivity of the infinite-dimensional Hubbard model.

A Monte Carlo-maximum entropy calculation of the optical conductivity of the infinite-dimensional Hubbard model is presented. We show that the optical conductivity displays the anomalies found in the cuprate superconductors, including a Drude width which grows linearly with temperature, a Drude weight which grows linearly with doping, and a temperature and doping-dependent mid-IR peak. These anomalies arise as a consequence of the dynamical generation of a quasiparticle band at the Fermi energy as T → 0, and are a generic property of the strongly correlated Hubbard model in all dimensions greater than one. Typeset using REVTEX c © 1994 by the authors. Reproduction of this article by any means is permitted for non-commercial