Title: Topological Phases emerging from Spin-Orbital Physics,
Abstract: We study the evolution of spin-orbital correlations in an inhomogeneous
quantum system with an impurity replacing a doublon by a holon orbital degree
of freedom. Spin-orbital entanglement is large when spin correlations are
antiferromagnetic, while for a ferromagnetic host we obtain a pure orbital
description. In this regime the orbital model can be mapped on spinless
fermions and we uncover topological phases with zero energy modes at the edge
or at the domain between magnetically inequivalent regions.