High Temperature Transport Properties in Attractive Hubbard Model

The attractive Hubbard model, with its negative on-site Coulomb interaction, provides a minimal framework for exploring strongly correlated fermion behavior, and is experimentally realizable using ultracold atoms in optical lattices. In contrast to its repulsive counterpart, the attractive Hubbard model is fermion-sign-free in determinant quantum Monte Carlo (DQMC) simulations, allowing for unbiased exploration across a wide range of parameter regimes. Here we use DQMC to investigate the high temperature transport properties of the attractive Hubbard model, with the goal of informing interpretations of transport measurements in relevant condensed matter systems.