The quantum teleportation protocol.
Rendering
\usepackage{quantikz}\begin{quantikz}
\lstick{$|\psi\rangle$} & \qw & \ctrl{1} & \gate{H} & \meter{} & \cwbend{2} & \qw & \qw \\
\lstick{$|0\rangle$} & \gate{H} & \targ{} & \qw & \meter{} & \cwbend{1} & \qw & \qw \\
\lstick{$|0\rangle$} & \qw & \qw & \qw & \qw & \gate{X} & \gate{Z} & \rstick{$|\psi\rangle$}
\end{quantikz}