archive: SETI ETI Quantum Communication

SETI ETI Quantum Communication

Walt Williams ( (no email) )
Fri, 30 Oct 1998 11:05:53 +0000

------- Forwarded Message Follows -------
From: "Brian Wong" <>
To: <>
Subject: SETI ETI Quantum Communication
Date: Thu, 29 Oct 1998 21:43:27 -0800
Hello All,

Anybody have details regarding the CalTech quantum experiment a
couple of days ago? A friend called me telling about the experiment
two weeks ago, this sounds to be the same experiment. There was
supposedly another group who performed a photon 'entanglement'
experiment but did not actually use all of the photons(?) whereas
the CalTech team did.

Any information would be appreciated.

Thank you,

Walt Williams, 98.10.30

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.

Taking this supposition to the extreme, advanced civilizations may
find absolutely no use for the RF and optical spectrum for
communication. Imagine no noise, no static, no propagation, no
interstellar scintillation, and (perhaps) no interference or bandwidth
considerations. It would be a most ideal means of long distance
communication. It took only over 100 years to go from spark gap to
lasers and now to quantum communication. The "technological window"
for the utilization of RF and Optical communication may not be very

Thus it is possible is that there are very few or maybe nobody to
listen for in RF or optical SETI. They're out there but we will never
hear them no matter how big the dish or telescope. A very disquieting
prospect. That's just a thought. Any comments?