1998/04/30 by Stefan Kirchner, S. Kirchner, H. G. Evertz +2 · 2 citations
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.59.1825
published as Phys. Ref. B59, 1825 (1999) · 10 pages, 14 figures. Published version
openalex publication_date 1999/01/15 · arxiv created 2000/10/02 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present results for the zero- and finite-temperature Drude weight D(T) and for the Meissner fraction of the attractive and the repulsive Hubbard model, as well as for the model with next-nearest-neighbor repulsion. They are based on quantum Monte Carlo studies and on the Bethe ansatz. We show that the Drude weight is well defined as an extrapolation on the imaginary frequency axis, even for finite temperature. The temperature, filling, and system size dependence of D is obtained. We find counterexamples to a conjectured connection of dissipationless transport and integrability of lattice models.