  We show that the coupling of homogeneous Heisenberg spin-1/2 ladders in
different phases leads to the formation of interfacial zero energy Majorana
bound states. Unlike Majorana bound states at the interfaces of topological
quantum wires, these states are void of topological protection and generally
susceptible to local perturbations of the host spin system. However, a key
message of our work is that in practice they show a high degree of resilience
over wide parameter ranges which may make them interesting candidates for
applications.
