Schiff Screening of Relativistic Nucleon Electric-Dipole Moments by Electrons

摘要

We show, at leading-order in the multipole expansion of the electron-nucleusinteraction, that nucleon electric-dipole moments are completely shielded byelectrons so that they contribute nothing to atomic electric-dipole moments,even when relativity in the nucleus is taken into account. It is well knownthat relativistic electron motion, by contrast, leads to dipole moments thatare not screened; we discuss the reasons for the difference.