On 5/7/2019 2:52 PM, Jason Resch wrote:
On Tuesday, May 7, 2019, 'Brent Meeker' via Everything List
<[email protected]
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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
Is there an algorithm where the answer would be something other than
during or after?
Since the question was ''At what /*point*/ in time does "the probability
of measuring the wrong answers" decrease?'' I don't thing
"during/after" is even an answer.
As I said, I think no answer exists until there's a measurement, the
computer will be in a superposition of states relative to the
measurement basis. So "at the time of measurement" would be the closest
answer. But I know some algorithms, like Grover's, become more accurate
as they run longer.
Brent
Jason
P.s. by "after" I meant by the time of completion of the computation.
Not some time after the computtion when the computer was no longer active.
Jason
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