cx¶ guppylang.std.quantum.cx(control: qubit, target: qubit) → None[source]¶ Controlled-X gate command. cx(control, target) Qubit ordering: [control, target] \[\begin{split}\mathrm{CX}= \begin{pmatrix} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 0 & 1 \\ 0 & 0 & 1 & 0 \end{pmatrix}\end{split}\]