Abstract
A framework to evolve three-nucleon ($3\mathrm{N}$) forces in a plane-wave basis with the similarity renormalization group (SRG) is presented and applied to consistent interactions derived from chiral effective field theory at next-to-next-to-leading order. We demonstrate the unitarity of the SRG transformation, show the decoupling of low and high momenta, and present the first investigation of universality in chiral $3\mathrm{N}$ forces at low resolution scales. The momentum-space-evolved $3\mathrm{N}$ forces are consistent and can be directly combined with the standard SRG-evolved two-nucleon (NN) interactions for ab initio calculations of nuclear structure and reactions.
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