Merge pull request #42 from jedbur/patch-1

typo in 7.2

source/07-stabilisers.Rmd

@@ -156,7 +156,7 @@ $$
     &\qquad-X\text{ stabilises }\ket{-}
   \end{aligned}
 $$
-where $\ket{\pm i}=\frac{1}{\sqrt{2}}(\ket{0}+i\ket{1})$ and $\ket{\pm}=\frac{1}{\sqrt{2}}(\ket{0}\pm\ket{1})$.
+where $\ket{\pm i}=\frac{1}{\sqrt{2}}(\ket{0}\pm i\ket{1})$ and $\ket{\pm}=\frac{1}{\sqrt{2}}(\ket{0}\pm\ket{1})$.
 
 On the Bloch sphere, these single-qubit stabiliser states lie at the intersection of the three axes with the surface of the sphere.