On Tue, Aug 21, 2018 at 5:00 PM Brent Meeker <[email protected]> wrote:

>
>
> On 8/21/2018 2:40 PM, [email protected] wrote:
>
>
>> If I start a 200 qubit quantum computer at time = 0, and 100 microseconds
>> later it has produced a result that required going through 2^200 = 1.6 x
>> 10^60 = states (more states than is possible for 200 things to go through
>> in 100 microseconds even if they changed their state every Plank time
>> (5.39121 x 10^-44 seconds), then physically speaking it **must** have
>> been simultaneous.  I don't see any other way to explain this result.  How
>> can 200 things explore 10^60 states in 10^-4 seconds, when a Plank time is
>> 5.39 x 10^-44 seconds?
>>
>
> It's no more impressive numerically than an electron wave function picking
> out one of 10^30 silver halide molecules on a photographic plate to
> interact with (which is also non-local, aka simultaneous).
>
>
Well consider the 1000 qubit quantum computer. This is a 1 followed by 301
zeros.  This is not only over a googol^2 times the number of silver halide
molecules in your plate, but more than a googol times the 10^80 atoms in
the observable universe.

What is it, in your mind, that is able to track and consistently compute
over these 10^301 states, in this system composed of only 1000 atoms?



> Also note that you can only read off 200bits of information (c.f. Holevo's
> theorem).
>
>
True, but that is irrelevant to the number of intermediate states necessary
for the computation that is performed to arrive at the final and correct
answer.

Jason

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