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Wikipedia said

"In the context of a nuclear magnetic resonance experiment, the Rabi frequency is the nutation frequency of a sample's net nuclear magnetization vector about a radiofrequency field. (Note that this is distinct from the Larmor frequency, which characterizes the precession of a transverse nuclear magnetization about a static magnetic field.)"

However the two definitions seem equivalent to me... Any clarifications?

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So I have a rough idea now. Rabi frequency is how hard you drive between the levels and Larmor frequency is how fast a state precesses. They corresponds to different directions(Rabi for rotation around any direction in the x-y plane and Larmor for rotations around the poles).

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