  Incoherent transport of excitations in one-dimensional disordered lattices
with pairs of traps placed at random is studied by numerically solving the
corresponding master equation. Results are compared to the case of lattices
with the same concentration of unpaired traps, and it is found that pairing of
traps causes a slowdown of the decay rate of both the mean square displacement
and the survival probability of excitations. We suggest that this result is due
to the presence of larger trap-free segments in the lattices with paired
disorder, which implies that pairing of traps causes less disruption on the
dynamics of excitations. In the conclusion we discuss the implications of our
work, placing it in a more general context.
