  We study the quantum phase transition in the three-dimensional disordered
itinerant antiferromagnet by Monte-Carlo simulations of the order-parameter
field theory. We find strong evidence for the transition being controlled by an
infinite-randomness fixed point: The dynamical scaling is activated, i.e., the
logarithm of the energy scales like a power of the length, implying a dynamical
exponent of infinity. The probability distribution of the energy gaps is very
broad and becomes broader with increasing system size, even on a logarithmic
scale.
