  In infrared-stable fixed-point field theories, the interaction energy of a
test particle is proportional to the non-relativistic (heavy source)
coordinate-space potential derived from the field strength produced by that
source. This is no longer true in ultraviolet-stable fixed-point field theories
(UVSFPFT) as they may not have a finite infrared fixed point. This leads to the
possibility that UVSFPFTs may have quite conventional field strength
distributions despite the unusual spatial dependence expected for the
interaction energy.
