Re: still confused over EPR
- From: "Greysky" <greyskyat@xxxxxxxxxxxxxxxx>
- Date: Sat, 14 May 2005 17:46:47 GMT
"Puppet_Sock" <puppet_sock@xxxxxxxxxxx> wrote in message
news:1116005168.722135.4970@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Well, I guess somebody should say "join the club."
> But I'm still confused over EPR and entanglement.
>
> The particular thing I'm confused over just now is,
> how do we know what the wave function of the two
> back-to-back particles is? That is, how do we know
> that the two photons in a pair in, say, Aspect's
> experiment, are in the singlet state? Up to some
> signs and maybe a factor of "i" and such that I'm
> too lazy to look up, it's like so.
>
> ( |H_left>|V_right> + |V_left>|H_right> ) / sqrt(2)
>
> How do we know it's that?
> Socks
>
We don't know by *measurement* that any two particles are in an entangled
state. The knowledge of their linkage comes later, while comparing results
over a cup of Java. If there is a correlation, then the particles were
linked. Think about it - if it were measurable whilst the experiment was in
progress, then you would have an easy methodology for transferring
information FTL- and it is not that easy or someone other than me would have
invented it over the past few decades.
Greysky
www.allocations.cc
Learn how to build a FTL radio - partially off line but not shut down!
.
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