Ultrafast topological phenomena in Weyl semimetals

For Weyl semimetals, we predict that an intense ultrafast (single-oscillation) circularly polarized optical pulse can induce a large population of the conduction band. The response of Weyl points to an ultrafast laser field is different and so the conduction population is highly textured which we call it topological resonance. The topological resonance is due to the Bloch motion of electrons in the reciprocal space where electron population textures are formed due to non-Abelian Berry curvature.