archive: Re: SETI ETI Quantum Communication

Re: SETI ETI Quantum Communication

Wayne Shanks ( )
Fri, 30 Oct 1998 12:18:30 -0500

Brian Wong wrote:
> Hi all,
> Here is an article from Reuters and a web page from IBM Research that
> talks about a successful "quantum teleportation" experiment in the
> lab. The experiment for the first time managed to physically
> "teleport" a beam of photons from one physical location to another.
> (taking advantage of EPR correlation for you quantum folks out there)
> I don't know if this topic has been addressed here before but if we
> are just discovering that "quantum communication" can be used to
> transmit information from one place to another then perhaps
> substantially more advanced ET civilizations could possibly, and
> routinely, communicate in this manner.

> Regards,
> Brian

This an interesting area, but there is a catch.... the reciever of the
quantum "information" can't decode the information unless he/she/it
knows what the complimentary part of the wave function is. Although is
seems like real information is being transmitted instantaneously, You
cant do anything with it untill you get the other half of the message
that was not transmitted. thus you are stuck wainting for a convntional
radio signal that will give you instructions on how to decode your
instantaneous quantum information into usefull clasical information.
Quantum teleportation and cryprography are interesting, but they are not
faster than light or RF communications. Indeed thay are much more
fragile than clasical signals.

Wayne S