On Wed, Dec 12, 2012 at 5:15 PM, meekerdb <meeke...@verizon.net> wrote:

>  On 12/12/2012 9:25 AM, John Clark wrote:
> On Tue, Dec 11, 2012  meekerdb <meeke...@verizon.net> wrote:
>   On 12/11/2012 9:31 AM, Jason Resch wrote:
>>  >>> Everett's QM is not a theory; it's just an interpretations.
>>  >> Not quite.  Deutsch's proposed experiment with reversible
>> computation and an AI yields different results for the CI and MWI, thus
>> they are theories which can be tested and differentiated.
>>  > Except his proposed experiment relies on a hypothetical quantum
>> computer that is conscious.
> Yes but Deutsch argues, convincingly I thought, that the reason it's so
> difficult to test is not the Many World's theory's fault, the reason is
> that the conventional view says that conscious observers obey different
> laws of physics, Many Worlds says they do not, so to test who's right we
> need a mind that uses quantum properties.
> In Deutsch's experiment to prove or disprove the existence of many worlds
> other than this one a conscious quantum computer shoots electrons at a
> metal plate that has 2 small slits in it. It does this one at a time. The
> quantum computer has detectors near each slit so it knows which slit the
> various electrons went through. The quantum mind now signs a document
> saying that it has observed each and every electron and knows what slit
> each electron went through. It is very important that the document does not
> say which slit the electrons went through, it only says that they went
> through one slit only, and the mind has knowledge of which one. Now the
> mind uses quantum erasure to completely destroy the memory of what slits
> the electrons went through. But all other memories and the document remains
> undamaged.
> But why should I think this is possible?  I'd like to see the actual
> mechanism or Hamiltonian that allows this.
>  And then the electrons continue on their way and hit the photographic
> plate. Now develop the photographic plate and look at it, if you see
> interference bands then the many world interpretation is correct.
> No, it only means the 'consciousness collapses the wave-function' theory
> is incorrect.  It doesn't follow that MWI is correct.
If observing a definite result doesn't collapse the wave function then what
does?  I think the experiment is meant to show collapse does not happen.
 And if there is no collapse then you have the MWI.


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