Topology and the doped Kondo Heisenberg model

In previous works, it has been proposed that the doped Kondo Heisenberg model is topological and hosts Majorana zero modes. These Majorana zero modes correspond to solitons of the gapped spin sector of the model. We have investigated this claim on the lattice using DMRG, and found no evidence for these proposed zero modes. In light of this, we revisit the original claims that the model is topological using bosonization. We discuss how this continuum analysis fits with the numeric data and the lattice model.