Abstract
We introduce a class of interacting fermionic quantum models in d dimensions with nodal interactions that exhibit superdiffusive transport. We establish non-perturbatively that the nodal structure of the interactions gives rise to long-lived quasiparticle excitations that result in a diverging diffusion constant, even though the system is fully chaotic. Using a Boltzmann equation approach, we find that the charge mode acquires an anomalous dispersion relation at long wavelength ω(q) ∼ q^z with dynamical exponent z= min[(2n+d)/2n,2], where n is the order of the nodal point in momentum space. We verify our predictions in one dimensional systems using tensor-network techniques.