  Mixing-demixing transitions in one-dimensional mixtures of fermions and
bosons are numerically investigated. With Monte Carlo simulations, we searched
the transitions by changing various parameters such as number densities of each
component, fermion-boson interactions, boson-boson interactions, and hopping
energies. In most cases we found clear evidences of the mixing-demixing
transitions. We also identified the roles of each microscopic parameter in the
transitions.
