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Originally posted by archasama
reply to post by zatara
I understand that it actually doesn't work because there is always the factor of observer that prevents electrons from spinning in both directions at the same time.
However, when a measurement of any type is made to a quantum system, decoherence breaks down and the wave function collapses into a single state. Therefore, the computer has to somehow continue making these calculations without having any measurements made until the proper time, when it can then drop out of the quantum state, have a measurement taken to read its result, which then gets passed on to the rest of the system.
Quantum computers have four states as opposed to two, hence the faster speed...