posted on Feb, 5 2011 @ 08:00 AM
They do work. MIT has one. There was a BBC show on 'What is Reality?' A few weeks back, they got a guy on from MIT with the uber-computer :p
To solve the problem with observing is that basically the quantum bits fly around in circles in a super-cooled vacuum which is so close to absolute
zero that it makes it hard for larger bits to bump into it (observe it).
In power terms basically it can do both 0 1 and 01 at the same time.... The MIT guy said something along the lines of "If the quantum computer was
the size of this room, it'd be more powerful than a normal computer the size of the universe". Who knows if he was being terribly accurate