§5.6 · THE SINGLE-COORDINATE ORBIT

The qubit sphere, derived from the ladder

With m = 1 the ladder generates spin one-half, and the orbit of the truth pole is the sphere CP¹. Move the state, then read it through the truth frame to see the Born weight cos²(θ/2).

Amber T at the north pole, blue F at the south pole, violet B on the equator, ivory the state.
|ψ⟩ = cos(θ/2)|T⟩ + e^(iφ) sin(θ/2)|F⟩
θ = {{thDeg}}° · φ = {{phDeg}}°
p_T = cos²(θ/2){{pT}}
p_F = sin²(θ/2){{pF}}
{{tally}}