File talk:Qcircuit Margolus.svg

Source?

@Geek3: I am loving all your pictures. One question here though, do you have a reference for this circuit? It might produce the right matrix but I think the whole point of Margolus gate is that you can derive a Toffoli-like gate with a simpler formula than a Toffoli (without using Toffoli itself). So I wonder if there is a better circuit for this. I have now checked that equation (2) of Song and Klappenecker 2003 reproduces the Margolus gate, where the G gate is just a Ry rotation on pi/4. Maybe this would be a better representation. --ReyHahn (talk) 10:06, 25 September 2022 (UTC)ReyHahn (talk) 09:49, 25 September 2022 (UTC)

Hi RayHahn, in this case the representation is rather obvious. Of course there are other circuits with the same functionality, which may be computationally more efficient. The representation with four G-gates may be more efficient, because it requires no three-qubit gates, but as a reader it is almost impossible to understand what it does. Therefore, I would not prefer that representation. Sure, if another representation is more clear or more canonical, let's upload that as well and swap the image in the article. --Geek3 (talk) 11:10, 25 September 2022 (UTC)