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Article-grounded definition
diagonal in the internal energy basis: it can make a clock in one internal state fall differently from the same species in another, which is what a clock-redshift test or a test comparing atoms prepared in different hyperfine states actually probes.
Read equation 7 in The Corner of the Equivalence Principle No Experiment Has Touched →
This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.
Equation guide → · This term → · Article →diagonal in the internal energy basis: it can make a clock in one internal state fall differently from the same species in another, which is what a clock-redshift test or a test comparing atoms prepared in different hyperfine states actually probes.
Equation guide → · This term → · Article →This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
Equation guide → · This term → · Article →This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
Equation guide → · This term → · Article →This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
Equation guide → · This term → · Article →This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
Equation guide → · This term → · Article →