LCP
Spin diffusion
Condensed matter theory
Finite temperature spin diffusion in the Hubbard model in the strong coupling limit
Finite temperature spin transport for a 1D system of electrons can be investigated using the spin-spin correlation function of the Hubbard model. In the infinitely strong repulsion limit, we find the transport is diffusive and calculate the diffusion constant. Our approach is based on the asymptotic analysis of Fredholm determinants. This is the first explicit derivation of spin diffusion from a microscopic model.