\documentclass[preview,convert={indir={aux/}, outdir={aux/}, outputdir={aux/}},border=40px]{standalone}
\usepackage{quantumcubemodel}

\begin{document}
\begin{qcmx}
\qcmxOO{0.28}
\qcmxOI{0.73}
\qcmxIO{0.21}
\qcmxII{0.57}
\qcmxRenderQQ

\node at (15, 5) {\Huge $\otimes$};

\def\qcmxOrientationQ{z}
\def\qcmxOffsetX{20}
\def\qcmxOffsetY{3}
\qcmxO{1}
\qcmxI{0}
\qcmxRenderQ

\node at (30, 5) {\Huge $=$};

\def\qcmxOffsetX{35}
\def\qcmxOffsetY{-1}
\qcmxOOO{0.28}
\qcmxOIO{0.73}
\qcmxIOO{0.21}
\qcmxIIO{0.57}
\qcmxRenderQQQ
\end{qcmx}
\end{document}