Re: PHYS; Quantum Teleportation
Sat, 13 Dec 1997 14:31:07 +0000

> Date: Fri, 12 Dec 1997 23:12:55 -0800 (PST)
> From: John K Clark <>

> On Fri, 12 Dec 1997 Dan Fabulich <> Wrote:
> >Yes, you can't understand the message unless we have a mutually
> >known key... But if I'm only sending you one of two messages, 0 or
> >1, then we can both "know what the message I want to send you is,
> >" having agreed upon that subluminally, but then use this agreement
> >to send superluminal communication.
> When a photon of indeterminate polarization arrives there is always a 50%
> probability it will get through, regardless of the direction I set my
> polarizer at, there is just no way around it. If my photon is absorbed by my
> polarizer set at 90 degrees, and there is a 50% chance it will be, then there
> is a 100% probability your photon will be transmitted through your polarizer
> set at 0 degrees, and that would give you the erroneous message to attack by
> land. Flipping a coin would work just as well for you, and it would be a lot
> easier.

I was under the impression that the whole point to this was that the
scientists could change the property (before measuring) of the stay
at home particle to be the opposite of a pre-selected particle? So
the only time the result would be random would be if the particle was
already in that configuration...which I understood to be the reason
that there is a limit of 75% (according to CNN). If you can select
which way the photon is polarized without actually measuring it, then
you can commo FTL.