We have calculated the atomic electric dipole moments (EDMs) d of ³He and ¹⁷¹Yb induced by their respective nuclear Schiff moments S. Our results are d(³He)=8.3×10^-5 and d(¹⁷¹Yb)=-1.9 in units of 10^-17(S∕e0.2em0exfm³)0.3em0exe0.2em0excm. By considering the nuclear Schiff moments induced by the parity- and time-reversal violating nucleon-nucleon interaction, we find d(¹⁷¹Yb)~0.6d(¹⁹⁹Hg). For ³He the nuclear EDM coupled with the hyperfine interaction gives a larger atomic EDM than the Schiff moment. The result for ³He is required for a neutron EDM experiment that is under development, where ³He is used as a comagnetometer. We find that the EDM for ³He is orders of magnitude smaller than the neutron EDM. The result for ¹⁷¹Yb is needed for the planning and interpretation of experiments that have been proposed to measure the EDM of this atom.
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Dzuba et al. (2007) studied this question.
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