  Color singlet two gluon exchange provides a perturbative model for the
pomeron. This mechanism is thought to explain the production of rapidity gaps
in hard dijet events at the Tevatron. It is shown that in $qQ$ scattering via
two gluon color singlet exchange the emission of soft gluons follows closely
the pattern found for $t$-channel photon exchange. Gluon emission is strongly
suppressed between the two quark jets. After hadronization this leads to a
depressed level of hadronic activity between the jets and thus allows the
formation of rapidity gaps.
