Scheme of programmable quantum gate array as a quantum cellular automaton on a tube. Remeshed to reduce number of faces in comparison with a few previous models of [quantum networks](https://sketchfab.com/ayvlasov/collections/quantum-networks). Blender *array modifiers* are applied twice to combinations of "empty" and basic elements (sphere with arrow, triplet, dumbbell) to produce *array of circular arrays*.
![](https://quantumbot.files.wordpress.com/2012/09/quctr2dc3.png)