I have long considered another quantum means of instantaneous communication.
Partial reflection (like oil film on water) depends on the thickness of the partially reflective layer. If the thickness increases a little the dominant reflected frequency shifts and this occurs in cycles, with no known limit. Also this still works even if you throw photons one at a time, much like the double slit experiment. Furthermore the dominant frequency at the top layer depends not only on the thickness of that layer, but of any layers beyond that. So in theory if you had layers of different thickness glass and effect the reflection at the surface of one layer based on the thickness of a layer behind it some distance away you could achieve some highly impractical means on optical FTL communication. Even the normal versions of this effect must be superluminal, albeit over a very small scale. And this can obviously be used for information transfer. John On Mon, Feb 17, 2014 at 10:30 AM, Eric Walker <[email protected]> wrote: > On Sun, Feb 16, 2014 at 12:50 PM, <[email protected]> wrote: > > I'm not sure that I even understand what it meant by the phrase. > > > If you were a little confused by it, I was very much so. It would be nice > if someone who knows a little about the research and the claim could > clarify what it's getting at and what it does and doesn't apply to. > > However If >> looking for a means of building an FTL receiver, I would suggest >> something that >> relies upon tunneling, e.g. a Josephson junction, provided that some >> aspect of >> the chance of tunneling is influenced by the electric potential. >> > > This reminds me of a different but related result concerning prisms. When > two prisms are adjacent, no refraction takes place as light passes through > the common surface between them. When they are separated by a distance, > refraction does occur, but not all of the time. In some cases photons will > tunnel through a barrier between the two prisms without refraction. If I > have understood what I have read, this tunneling is thought to occur > instantaneously, in contrast to the situation where the photon exits one > prism, travels through the air and enters the other prism. The effect is > called the Hartman effect [1]. > > As I read more about FTL communication, I now understand that in the > context of special relativity it is interpreted to imply the existence of > time travel, since in some reference frame the effect (the receiving of the > information) will occur prior to the cause (the sending of the information). > > Eric > > > [1] http://en.wikipedia.org/wiki/Hartman_effect >
