Ab Initio Calculation of Schiff Moments in Heavy Nuclei*

Interpreting the results of experiments to measure electric dipole moments in certain atoms and molecules requires one to compute the dependence of the nuclear Schiff moment on underlying sources of CP violation. Here we extend the valence-space In-Medium Similarity Renormalization Group so that it includes the parity- and time-reversal-violating nucleon-nucleon interaction created by CP-violating particle physics alongside the usual chiral strong interaction. We apply the new scheme to 199Hg, the isotope with the best experimental limit on its atomic dipole moment, and to other heavy nuclei.