  CP violating interactions are required to realize the matter abundance of our
Universe. It is however known that the standard model of particle physics does
not contain sufficient CP violation. The electric dipole moment (EDM) of atomic
systems is a very sensitive experimental probe of CP violation beyond the
standard model, and it is very actively studied in experiments. The atomic EDM
has a significant sensitivity to hadronic CP violation, but its quantification
has for long been obstructed by the nonperturbative physics of quantum
chromodynamics. Quite recently, the contribution of the Weinberg operator (CP
violating three-gluon interaction) to the atomic EDM has been analyzed, and we
are almost attaining the quantification era of the CP violating hadronic
interaction in the leading order of standard model effective field theory. In
this proceedings contribution, we summarize the current attempt to quantify the
hadronic CP violation contribution to the EDM of atoms.
