On 5/7/2019 2:08 PM, Jason Resch wrote:


On Tuesday, May 7, 2019, 'Brent Meeker' via Everything List <[email protected] <mailto:[email protected]>> wrote:



    On 5/7/2019 1:49 PM, Jason Resch wrote:


    On Tuesday, May 7, 2019, 'Brent Meeker' via Everything List
    <[email protected]
    <mailto:[email protected]>> wrote:



        On 5/7/2019 11:52 AM, Jason Resch wrote:


        On Tue, May 7, 2019 at 1:07 PM 'Brent Meeker' via Everything
        List <[email protected]
        <mailto:[email protected]>> wrote:



            On 5/7/2019 9:53 AM, Jason Resch wrote:


            On Tuesday, May 7, 2019, 'Brent Meeker' via Everything
            List <[email protected]
            <mailto:[email protected]>> wrote:



                On 5/6/2019 11:11 PM, Jason Resch wrote:

                    Not at all. In fact a quantum computation only
                    works because all the wrong answers have a
                    high probability of being eliminated by
                    destructive interference...which requires that
                    they be computed in the same world.


                So prior to the computation, all of the wrong
                answers existed?

                There is no answer until the output is measured.


                Brent



            Then what did you mean by "all the wrong answers have a
            high probability of being eliminated". Eliminated from
            what?

            I mean not showing up as the answer.


        And they don't show up because... ?

        Their amplitude in the superposition is small.  If you've got
        something to say, just say it.


        Brent



    You seem to be avoiding the implication that the system starts in
    a state where all possible answers, both wrong and correct exist.

    You seem to think that because something might exist in the future
    it exists.


    Brent




At what point in time does "the probability of measuring the wrong answers" decrease?

1. Before the computation
2. During/after the computation
3. At the time of measurement
4. Something else
5. Indeterminate

My guess is #2, what do you think?
During/after is pretty broad.  You're assuming that when the answer is measured can be varied independently of the computation.  Even classical computations don't have an answer ready to be output at any time.  Some do, but interate so that the answer becomes more accurate with run time.  So I think it depends on the structure of the algorithm.

Brent


Jason

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