Quantum Monte Carlo simulation for the spin-drag conductance of the Hubbard model

In the situation of two electrostatically coupled conductors, a current in one conductor may induce a current in the other one. We will study this phenomenon, called Coulomb drag, in the Hubbard chain where the two ‘conductors’ are given by fermions with different spin orientations. With the aid of a Monte Carlo approach, which we presented in a recent paper, we calculate the trans-conductance in different variants of the Hubbard chain (with/without impurity and additional (long-ranged) interactions) for different fillings.