Quant entanglement and relativity

Arrow · Post by **Arrow** » 2003-04-07 06:01pm

http://www.spacedaily.com/news/cosmology-03j.html

I found this article at Space Daily, and it discusses the effect of relativity on quantum entanglement.

Thoughts?

Kuroneko · Post by **Kuroneko** » 2003-04-07 09:08pm

Quantum teleportation to different inertial frames is nice, but the other application doesn't strike me as reasonable You can only tell that information was transferred instantaneously if you actually compare the results, and this would be limited by the speed of light. Without this, the person with the second entangled particle has no way to tell whether it was his measurement affecting the first or the first has already affected the second.

It's not impossible that this new kind of entanglement might get away with it, but I don't see an expalanation of how the theory would allow this, I'm not going to believe it.

Arrow · Post by **Arrow** » 2003-04-07 09:19pm

The whole clock idea struck me as odd. What are they implying with it? That you can keep to atomic clocks in synch without measuring the particles? Seems to be very odd.

The site appears to have a lot of good information, but the presentation of some of it seems to border on fiction.

Kuroneko · Post by **Kuroneko** » 2003-04-07 09:24pm

Arrow Mk84 wrote:The site appears to have a lot of good information, but the presentation of some of it seems to border on fiction.

Precisely. If they actually find that quantum effects violate relativity at such a fundamental level as their clock idea implies, all hell would've broken loose by now. Until I see some very convincing evidence, I'm going to believe in relativity instead.