Since you didn't include it, but it's relevant to the topic at hand -- Michael Freedman is also a Fields medalist that did substantial work in topology. Which is, ultimately, why he's involved with Station Q -- he was part of the group that realized you could use the topological structure of certain interactions to encode general computations, and was part of convincing MS to pursue that.
Not sure who else might have a device that can instantiate in some physical way a Quantum Superposition, but Microsoft showed such a device during that discussion: https://youtu.be/d7f_GZsQMpA?t=1h3m6s
I once attended a talk on the subject by Michael Freedman who is with Microsoft Station Q. They are trying to build just such a computer.