Authors: Giuseppe Benfatto, Pierlugi Falco and Vieri Mastropietro
Universal Luttinger Liquid Relations in the
1D Hubbard Model
Abstract: We study the 1D extended Hubbard model with a weak repulsive short-range interaction in the non-half-filled band case, using non-perturbative Renormalization Group methods and Ward Identities. At the critical temperature, T=0, the response functions have anomalous power-law decay with multiplicative logarithmic corrections. The critical exponents, the susceptibility and the Drude weight verify the universal Luttinger liquid relations. Borel summability and (a weak form of) Spin-Charge separation is established.
Keywords: Luttinger liquid relations, critical exponens, Renormalization GroupGiuseppe Benfatto