Re: Quantum communication might be possible?


In article <1135157706.069946.108590@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
frisbieinstein@xxxxxxxxx writes:
|>
|> > Secondly, you stated that the entanglement propagates at the speed
|> > of light. That is really what I asked you whether you had any
|> > evidence for - as far as I know, nobody has done the experiment,
|> > but lots of people "know" what the answer will be. That isn't
|> > science, but dogma.
|>
|> Just to make certain we are discussing the same thing, the "resolution
|> of the entanglement" or whatever where both photon states become
|> defined happens instantaneously without any barrier of time or space.
|> It is a non-local process or effect or whatever.

Not at all. Nobody has demonstrated that by experiment, either, and
there is at least one theoretically testable scenario.

Locations A and B share an entangled 'item'. Both make a series of
measurements on it and record them and their time. They then get
together, recording their accelerations, match their experimental
time frames and compare notes. Elementary statistics will then
enable them to tell if the effect transferred instantaneously, even
if it didn't transfer any information at the time.

|> The only quibbling is
|> about whether this amazing thing is of any practical use to humans.

That is the main issue, true.

|> So, I claimed that all entanglement begins when two photons are created
|> entangled and since they travel at c then entanglement propagates at
|> light speed. Hmm, there are indeed some hidden assumptions in there.
|> If two separated regions of an EM field decided to become entangled how
|> would I know? I wouldn't. So yes, I really have no idea about that,
|> and have not a clue as to how such a thing could possibly be
|> investigated even in a thought experiment.

My scenario would work for that case, too, if you could identify
the items to look at.


Regards,
Nick Maclaren.

.