\documentclass[border=2px]{standalone}

\usepackage[braket, qm]{qcircuit}
\usepackage{graphicx}

\begin{document}
\scalebox{1.0}{
\Qcircuit @C=1.0em @R=0.2em @!R { \\
	 	\nghost{{q}_{0} :  } & \lstick{{q}_{0} :  } & \gate{\mathrm{H}} & \gate{\mathrm{X}} & \qw & \qw & \qw & \ctrl{1} & \ctrl{1} & \qswap & \ctrl{1} & \ctrl{1} & \multigate{1}{\mathrm{Dcx}}_<<<{0} & \ctrl{1} & \ctrl{1} & \qw & \qw\\
	 	\nghost{{q}_{1} :  } & \lstick{{q}_{1} :  } & \qw & \qw & \qw & \qw & \qw & \targ & \ctrl{1} & \qswap \qwx[-1] & \qswap & \ctrl{1} & \ghost{\mathrm{Dcx}}_<<<{1} & \multigate{1}{\mathrm{Dcx}}_<<<{0} & \ctrl{1} & \qw & \qw\\
	 	\nghost{{q}_{2} :  } & \lstick{{q}_{2} :  } & \qw & \qw & \qw & \qw & \qw & \qw & \targ & \qw & \qswap \qwx[-1] & \qswap & \qw & \ghost{\mathrm{Dcx}}_<<<{1} & \multigate{1}{\mathrm{Dcx}}_<<<{0} & \qw & \qw\\
	 	\nghost{{q}_{3} :  } & \lstick{{q}_{3} :  } & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qw & \qswap \qwx[-1] & \qw & \qw & \ghost{\mathrm{Dcx}}_<<<{1} & \qw & \qw\\
	 	\nghost{{q}_{4} :  } & \lstick{{q}_{4} :  } & \gate{\mathrm{Z}} & \gate{\mathrm{S}} & \qw & \qw & \qw & \gate{\mathrm{S^\dagger}} & \gate{\mathrm{T}} & \gate{\mathrm{T^\dagger}} & \gate{\mathrm{P}\,(\mathrm{\frac{\pi}{2}})} & \gate{\mathrm{P}\,(\mathrm{\frac{\pi}{2}})} & \qw & \qw & \qw & \qw & \qw\\
	 	\nghost{{q}_{5} :  } & \lstick{{q}_{5} :  } & \ctrl{1} & \ctrl{1} & \dstick{\hspace{2.0em}\mathrm{P}\,(\mathrm{\frac{\pi}{2}})} \qw & \qw & \qw & \gate{\mathrm{Y}} & \gate{\mathrm{R_X}\,(\mathrm{\frac{\pi}{3}})} & \multigate{1}{\mathrm{R_{ZX}}\,(\mathrm{\frac{\pi}{2}})}_<<<{0} & \gate{\mathrm{U}\,(\mathrm{\frac{\pi}{2},\frac{\pi}{2},\frac{\pi}{2}})} \barrier[0em]{1} & \qw & \gate{\mathrm{\left|0\right\rangle}} & \qw & \qw & \qw & \qw\\
	 	\nghost{{q}_{6} :  } & \lstick{{q}_{6} :  } & \control\qw & \control \qw & \qw & \qw & \qw & \qw & \qw & \ghost{\mathrm{R_{ZX}}\,(\mathrm{\frac{\pi}{2}})}_<<<{1} & \qw & \qw & \qw & \qw & \qw & \qw & \qw\\
\\ }}
\end{document}