It can be seen that this system is exactly the same as the two-state system discussed in the previous section, provided that the make the following identifications: \[\begin{aligned} \psi_1 &\rightarr...It can be seen that this system is exactly the same as the two-state system discussed in the previous section, provided that the make the following identifications: ψ1→χ+,ψ2→χ−,ω21→geB02m,γ→−geB14m. The resonant frequency, ω21, is simply the spin precession frequency in a uniform magnetic field of strength \(B_0…