"The authors are planning to work closely with a team of experimentalists to design a proof-of-concept system, they said." - Pardon if I'm mistaken, but this seems like a fancy way of saying they have no evidence at all so far.
Quantum Mechanics is pretty damn solid. I expect they'll find their evidence, and figuring out that something is possible in QM is more than good enough reason to try it.
If that turns out to be false then QM will have been disproven, which is even bigger news!
