Re: FTL transmission?

From: Ross A. Finlayson (
Date: Tue May 30 2000 - 23:15:56 MDT

Brian Atkins wrote:

> Eugene Leitl wrote:
> >
> > Brian Atkins writes:
> > > Can anyone clear this up for me: if they have light signals emitted from
> > > this setup on the far end even before the light on the near end has fully
> > > entered the chamber, what is preventing me from constructing a very long
> > > chamber of this sort from here to Alpha Centauri and then conducting
> > > transmissions through it with no delay whatsoever?
> >
> > Because it doesn't scale (quantum entanglement does though), and you
> > still need a relativistic channel to distinguish the signal from
> > noise.
> I still don't get it, what noise? If I'm sitting at the far end of this
> thing with a photodetector then it should only be going off when photons
> hit it as they exit the far end. How will there be noise? And what is
> preventing me from scaling it up and spitting out a continuous stream of
> photon packets?
> >
> > Since superluminal information transfer is equivalent to time travel
> > (and hence paradoxes etc.), don't expect true ansible real soon.
> I am confused here too. I don't see how this would be time travel.
> Isn't there a distinction between information flow (images of events...
> say pictures we see in a telescope of a supernova blowing up) and the
> actual event generating the information? So what if I can transmit
> a digital pic of the supernova blowing up to someone far away before
> they can see it in their telescope- that isn't really time travel as
> far as I can see. The supernova has still already blown up whether or
> not they can see it yet. Light does not create time. Movements of
> atoms creates the illusion of time.

Well, somebody told me the space time algebra (STA) is a 4 or 5-dimensional
non-Euclidean (non-positive) definite quadratic form. So, x, y, and z are
dimensions 1, 2, and 3, and 4 is t with negative characteristic basis vector and
sometimes 5 is a projection basis vector, also negative. After 3 I am using words
that might be incorrect.

This archive was generated by hypermail 2b29 : Thu Jul 27 2000 - 14:12:15 MDT