Superconducting cosmic strings as sources of cosmological fast radio
  bursts
  In this paper we calculate the radio burst signals from three kinds of
structures of superconducting cosmic strings. By taking into account the
observational factors including scattering and relativistic effects, we derive
the event rate of radio bursts as a function of redshift with the theoretical
parameters $G\mu$ and $\mathcal{I}$ of superconducting strings. Our analyses
show that cusps and kinks may have noticeable contributions to the event rate
and in most cases cusps would dominate the contribution, while the kink-kink
collisions tend to have secondary effects. By fitting theoretical predictions
with the normalized data of fast radio bursts, we for the first time constrain
the parameter space of superconducting strings and report that the parameter
space of $G\mu \sim [10^{-14}, 10^{-12}]$ and $\mathcal{I} \sim [10^{-1},
10^{2}] ~ \rm{GeV}$ fit the observation well although the statistic
significance is low due to the lack of observational data. Moreover, we derive
two types of best fittings, with one being dominated by cusps with a redshift
$z = 1.3$, and the other dominated by kinks at the range of the maximal event
rate.
