Domain walls in chiral p-wave superconductors: Quasiparticle spectrum and dynamics

We calculate microscopically the viscous friction coefficient and the effective mass of domain walls separating regions of opposite chirality in clean p-wave superconductors with k(x) +/- ik(y) order parameter. The domain-wall viscosity and inertia are determined by the transitions between different Bogoliubov quasiparticle states induced by the domain-wall motion. As a by-product, we present a detailed analysis of the quasiparticle spectrum, both bound and scattering, in the presence of a general domain wall with an arbitrary phase difference between the domains.