But the guy who made that bet doesn't think physics prevents a quantum computer. "Many people assumed I was a QC skeptic, and was offering the prize because I hoped to spur research aimed at disproving QC. Which is actually an interesting misreading" http://www.scottaaronson.com/blog/?p=902
Yeah I was just pointing out that there is disagreement. I think of it like time travel - nobody has proved that it is impossible, but a lot of people suspect that a "sensible" universe wouldn't allow it.
