# Quantum Computing #03: Represent single qubit on the Bloch Sphere

The general state of a qubit $$|q\rangle$$ $$|q\rangle = \alpha|0\rangle + \beta|1\rangle$$ where $$\alpha, \beta \in \mathbb{C}$$ (complex number) since we cannot measure global phase, we can only measure the difference in phase between the states ...