On 8/7/2019 2:37 PM, Jason Resch wrote:
On Wed, Aug 7, 2019 at 2:23 PM 'Brent Meeker' via Everything List
<[email protected]
<mailto:[email protected]>> wrote:
On 8/7/2019 8:30 AM, Jason Resch wrote:
> This is made most clear in the case of a quantum computer.
Where the
> quantum computer can be viewed as one WORLD (def 1) that
contains many
> little worlds (def 2), where each computational trace
constitutes its
> own little world, causally isolated from the rest.
Except those computational traces DO NOT constitute little worlds.
They
are not causally isolated. The whole function of the computer
depends
on them interacting, i.e. interfering coherently.
It depends on the algorithm.
If, as in my neural net example, interference is not used, the many
computations are causally isolated, and will remain so (FAPP) once I
read the output bits.
You seem to want it both ways. "Yes they are many worlds, but they're
not entirely or always completely causally isolated, so they're not
really separate worlds."
You're the one who introduced worlds and little worlds. My point is
just that doing computations with lots of qubits doesn't imply there are
separate worlds in which the computations happen; in fact it requires
the contrary if the computation is to come to a single conclusion. Of
course if you just measure some state and project it onto one of two
possible states, you can say, "Well there was another world were the
projection went the other way and so there must be another world for
that to happen in...which however is inaccessible from this world".
But that's back to Everett's argument and has nothing to do with the
complexity of calculation or the number of components of the computers
state.
Brent
Jason
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