Abstract
Precision measurements of the X2Σ(v, N) = (0, 0) → (vu, 0) (vu = 1, 2, 3, 4) transition frequencies from optically trapped 88Sr6Li and 40Ca6Li molecules are proposed, with the intention to test the variation in the proton-to-electron mass ratio mp/me. The Stark shifts induced by the trap and Raman lasers are eliminated by choosing appropriate frequencies (magic frequencies). These transitions are measurable with an uncertainty lower than 10−16 and can be used to test the variation in mp/me, as already shown with 174Yb6Li molecular transitions.
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