Quantum State Basis
-------------------

	|Ψ> = C_+ |+> + C_- |-> 	with |C_+|^2 + |C_-|^2 = 1

	Example (pic)

	Spin in x, y, and z (pic)

	Coefficients in general
		|+x> = C_+ |+z> + C_- |+z>
		C_+ = e^(i δ_+) / √2 ,  C_- = e^(i δ_-) / √2

		<+x| S_z |+x> = <S_z> = expectation value