We've built a quantum computing mod. It is a real quantum circuit simulation, and we're making tutorials and stuff.
There are sources available, though the mod is fairly new so I have not had time to comment and do cleanup etc. I will devote the coming few days to mostly doing that though.
Thread. It's all in there: http://www.minecraftforum.net/topic/1946878-quantum-circuits-computers-redstone-compatible/
Cheers // Andreas