On the abundance of primordial bound states of superheavy magnetic
  monopoles
  It has been suggested that superheavy charged particles might have been born
in primordial bound pairs at the end of cosmic inflation. Such pairs have been
proposed as a source of ultra-high energy cosmic rays (UHECR). We show that
primordial bound pairs of magnetic monopoles larger than $10^{-9}$ cm quickly
thermolise due to the interaction with primordial electron-positron plasma and
any such initial primordial concentration is washed out. The final
concentration will therefore be defined by their equilibrium abundance.
