  In this Comment we would like to emphasize that in Phys. Rev. B 90, 104506
(2014) the calculated energy spectrum takes into account only the small
interaction (cross) term and, additionally, this term is only calculated at the
instant when the two vortices reconnect. The majority of the kinetic energy is
contained in the self-energy term which has a characteristic spectrum of $1/k$.
If this, and the additional average over time, is taken into account the
suggested Kolmogorov type $k^{-5/3}$ spectrum is likely not visible in the
kinetic energy spectrum which contains both terms. Therefore, we find the
suggestion misleading that the Kolmogorov spectrum in superfluids arises from
the reconnection of vortices.
