You can't use tachyons to send information faster than the speed of light.

[bananas]

From the usenet sci.physics FAQ:

http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/tachyons.html

<snip>

The bottom line is that you can't use tachyons to send information faster than the speed of light from one place to another. Doing so would require creating a message encoded some way in a localized tachyon field, and sending it off at superluminal speed toward the intended receiver. But as we have seen you can't have it both ways: localized tachyon disturbances are subluminal and superluminal disturbances are nonlocal.

<snip>

[ret5hd]

1. i knew you were going to say that.

[RickFromMN]

2. Isn't that according to Einstein's Special Theory of Relativity? It would be exciting if Einstein

were wrong. There would be so much new science to learn.

[bananas]

3. Yes. nt

[bananas]

4. Some scientists have suggested the neutrinos are taking a shortcut through other dimensions

and not really going faster than light.
In that case, we could use them to send information faster than using photons (radio waves or laser communications).

"Dimension-hop may allow neutrinos to cheat light speed" http://www.democraticunderground.com/discuss/duboard.php?az=view_all&address=228x83915

[tama]

6. EPR

Google Einstein-Podolsky-Rosen tests of non-local phenomena (in relation to 4D-spacetime).

[tama]

5. Depends

on what you mean by information and what geometric space you refer to by "local". Usually locality refers to subluminal 4D-spacetime (Minkowski space), but phenomena that are non-local in Minkowski space can be local in n-dimensional Hilbert space. Or in some mathematical description of holographic space, if and when such can be found.

[bananas]

7. Thanks.

Feel free to expand on that.