See the causal joint in quantum-based proposals on divine action, mode 3. It may however be significant that two important candidates for loci of particular divine action - mutations in genetic material and neuronal events in the human brain - may both be instances where such amplification is possible. See Russell, RJ, ‘Theistic evolution and special providence: does God really act in nature?’ in Evolution and Molecular Biology: Scientific Perspectives on Divine Action, ed. by RJ Russell et al. Vatican Cty and Berkeley, Ca.: Vatican Observatory and CTNS, 1998) on mutation. On quantum events in the brain see Penrose, R, Shadows of the Mind: A search for the missing science of consciousness (Oxford: Oxford University Press, 1994) Ch.7.