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Clocks with oddly shaped electron orbitals are the most sensitive detectors of this.","posed_since":"","precise":"In the Standard-Model Extension, the electron coefficients $c_{JK}$ (traceless symmetric) are bounded at about $10^{-21}$ by Yb+ E3 clock comparisons with orthogonal quantization axes (Sanner et al 2019). Determine whether any $c_{JK}$ is nonzero at the $10^{-23}$ level using highly charged ions or Dy and Yb+ states with large anisotropic momentum operators.","problem_ref":"22e48a57f20390c6bb185b2c24a1de05946c5aa8549c35611ac1cddc5916bd72","references":"","settled_by":"Sidereal-modulation analysis of a clock comparison with anisotropy sensitivity enhanced by more than 100 over Yb+ E3.","status_note":"","title":"Are electron-sector Lorentz-violation coefficients nonzero at 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