  It has been proposed that there are degrees of freedom intrinsic to quantum
critical points that can contribute to quantum critical physics. We point out
that this conclusion is quite general below the upper critical dimension. We
show that in 2+1 D antiferromagnets skyrmion excitations are stable at
criticality and identify them as the critical excitations. We found exact
solutions composed of skyrmion and antiskyrmion superpositions, which we call
topolons. We include the topolons in the partition function and renormalize by
integrating out small size topolons and short wavelength spin waves. We obtain
correlation length exponent nu=0.9297 and anomalous dimension eta=0.3381.
