Symbol eta_cl

The passage around this formula

…violation operator $\hat\eta$ acting on the internal, and for two-body tests the joint, Hilbert space. Expand that operator and, the paper argues, exactly five structurally distinct pieces fall out: $\hat\eta = \eta_{cl} + \hat\eta_{diag} + \hat\eta_{coh} + \hat\eta_{sup} + \hat\eta_{ent}$. $\eta_{cl}$ is an ordinary number, the same for every state — MICROSCOPE’s slot. $\hat\eta_{diag}$ is 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…

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