Re: Bell's inequality vs. Kerr Rotation

["Sue..." <suzysewnshow@xxxxxxxxxxxx>]

manofsan@xxxxxxxxx wrote:
> I have a question, after having read about a non-destructive spin
> measurement experiment, which was cited as one of the top science
> stories of 2006:
>
> http://physicsweb.org/articles/news/10/12/15/1#11
>
> http://optics.org/cws/Articles/ViewArticle.do;jsessionid=D7E47731913829DB57F86B4716735268?articleId=26434&channel=technology&page=1
>
> So that announcement immediately makes me wonder about Bell's
> Inequality:
>
> http://en.wikipedia.org/wiki/Bell%27s_inequality#Description_of_Bell.27s_theorem
>
> They say that you can't use the "spooky action at a distance"
> (correlation violation) to communicate with, since you can't
> predict/measure in advance what an entangled particle's state will be.
>
> But the non-destructive measurement experiment shows that you can
> indeed measure it in advance, without significantly disturbing/altering
> that particle's state (or its entanglement?)
>
> Wouldn't this Kerr rotation measurement method then allow for the
> pre-screening of entangled pairs, based on measurement in advance of
> state properties like spin?
>
> Couldn't this then be used to exploit the correlation violation (aka
> "spooky action at a distance") in such a way as to permit its use for
> communication?
>
> For instance, using the Alice & Bob example, wouldn't it be possible to
> use pre-measured entangled electron pairs of known spin state, and use
> the orientation of  the apparatus on one end as a way to modulate an
> information signal, which would then be detected with the other party
> through the correlation violation?
>
> To me, it would seem intuitive that the answer is yes. Why shouldn't
> this be able to work?
> Please, someone kindly take the time to give me a reasoned reply, even
> if my post sounds ignorant.

slot+antenna
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Sue...

http://farside.ph.utexas.edu/teaching.html
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