On 6/17/2018 5:20 AM, Jason Resch wrote:
How do you explain the finite computational resources of a table-top
quantum computer factoring a prime number in seconds when it would
take a classical computer the size of the solar system 10^100 years to
do the same calculation?
David Deutsch notes that quantum computers present a strong challenge
to defenders of single-universe interpretations, saying “When a
quantum computer delivers the output of such a computation, we shall
know that those intermediate results must have been computed
somewhere, because they were needed to produce the right answer. So I
issue this challenge to those who still cling to a single-universe
world view: if the universe we see around us is all there is, where
are quantum computations performed? I have yet to receive a plausible
reply.”
As Scott Aaronson pointed out the computation relies on interference
effects which means it all happens in one world - in spite of Deutsch's
wishful thinking.
Brent
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