Entangled State

In Quantum Computing we can create an entangled state by doing the following:

Start in $|00⟩$.

\require{AMScd} \begin{CD} \ket{ 00 } @>H>>\ket{ 00 } +\ket{10} @>CNOT>>\ket{ 00 } +\ket{ 11 } \end{CD} $$Then $q_0$ and $q_1$ are entangled, always having the same value.