I am starting to learning quantum computing and am currently reading Quantum Computing: A Gentle Introduction. As I started reading into the first section after the Introduction, it talks about basis vectors |0⟩ = |↑⟩ and |1⟩ = |→⟩ along with this figure:
However, what confuses me is why |0⟩ = |↑⟩ and |1⟩ = |→⟩ are, respectively, represented as \begin{pmatrix}1 \\ 0\end{pmatrix} \begin{pmatrix}0 \\ 1\end{pmatrix}
Shouldn't |↑⟩ be represented as \begin{pmatrix}0 \\ 1\end{pmatrix}
and shouldn't |→⟩ be represented as \begin{pmatrix}1 \\ 0\end{pmatrix}, since those appear to be their heads' coordinates on the circle?