Rabi Oscillation

P↑(t) = cos²(ω₀t/2) — deterministic spin flip, no measurement, no collapse. NMR in one formula.
ω₀/(2π) = 1.0 MHz
θ₀ = 0° (|↑⟩)
t = 0.00 µs
P↑ = 1.000
P↓ = 0.000
P↑+P↓ = 1.000
Period = 1.00 µs