Q & A and discussions

You should check out the document "LECTURE NOTES" chapiter 2.10 "la sphère de bloch" figure 2.14 page 44 and 45, that figure will help you visualize the vector inside of the sphere or you can convert it into a state of the form cos(theta) |0> + sin(theta) exp(i phi) |1> where theta and phi are angles, thus you will now the direction of your vector with coordinates theta and phi (remember i = exp(i pi/2))