Resistion, I agree with your comment. A lab setting is one thing, but to scale up, it would imply that the system would have to spend large amonunt of resources to limit other sources of influence (NOISE). So from the start this new computing method is doomed. It is tough enough to control electrical domain, now add to the mix magnetic, radiation sources, gavity (?), etc...
"One challenge facing scientists is that the spins of electrons, or any other quantum particles, are incredibly delicate. Any outside influences, whether a wisp of magnetism or glimpse of light, destabilizes the electrons' spins and introduces errors."
Shielding from noise sources is going to be a toughie.
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