It sounds like quantum uncertainty is behaving like rounding errors in a long series of calculations. By not resolving the quantum uncertainty in an intermediate calculation (akin to rounding an intermediate result), one can continue to use the exact result in further calculations introducing uncertainty (rounding error) only in the final calculation. One wonders if a close examination of the design of existing quantum computing devices would reveal their lack of precision lies in an attempt to store some intermediate result in a non-quantum state to be combined with a future quantum result.

Pierre Vella-Zarb - 28.07.10

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