daniel, 21 days ago

@metin Thanks for sharing, very interesting!

As this rather important part is missing from the article, "The thorium crystal trick" also involves (from the paper):

"Placing the atoms in a solid-state crystal lattice confines them to a region that is much smaller than the excitation wavelength (Lamb–Dicke regime), which suppresses the effects of photon recoil and first-order Doppler shift on the nuclear transition".

Explanations of this statement can be found here:

https://www.thuliumlab.ru/blog/cold-atoms/dicke/

metin, 21 days ago

@daniel Thanks, going to read that too!

Doppler, the man behind the Doppler sound effect. 👍

https://en.wikipedia.org/wiki/Doppler_effect