  We analyze dynamical transport properties of a hybrid nanostructure,
comprising a correlated quantum dot embedded between the source and drain
electrodes, which are subject to an ac voltage, focusing on signatures
imprinted on the charge transport by the side-attached Majorana zero-energy
mode. The considerations are based on the Kubo formula, for which the relevant
correlation functions are determined by using the numerical renormalization
group approach, which allows us to consider the correlation effects due to the
Coulomb repulsion and their interplay with the Majorana mode in a
non-perturbative manner. We point out universal features of the dynamical
conductance, showing up in the Kondo-Majorana regime, and differentiate them
against the conventional Kondo and Majorana systems. In particular, we predict
that the Majorana quasiparticles give rise to universal fractional values of
the ac conductance in the well-defined frequency range below the peak at the
Kondo scale. We also show this Kondo scale to actually increase with
strengthening the coupling to the topological superconducting wire.

Mesoscale and Nanoscale Physics;Strongly Correlated Electrons;Superconductivity