domokato,
That’s the thing, though. It’s not when you change the first particle, it’s when you measure it (which does change it, but once the measurement is done the pair is no longer entangled so any changes to the particles are no longer correlated).

I have no clue how they actually would manage to do this, but the program proposes that it is possible. TG I am not required to prove the claim.

Some wiki articles for the things we were talking about:

No-broadcast theorem: http://en.wikipedia.org/wiki/No-broadcast_theorem - “since quantum states cannot be copied in general, they cannot be broadcast.”
No-teleportation theorem: http://en.wikipedia.org/wiki/No_teleportation_theorem - “In quantum information theory, the no-teleportation theorem states that quantum information cannot be measured with complete accuracy.”
No-communication theorem: http://en.wikipedia.org/wiki/No-communication_theorem - “In quantum information theory, a no-communication theorem is a result which gives conditions under which instantaneous transfer of information between two observers is impossible.”

Then, later: “The no-communication theorem thus says shared entanglement alone can not be used to transmit quantum information. Compare this with the no teleportation theorem, which states a classical information channel can not transmit quantum information. (By transmit, we mean transmission with full fidelity.) However, quantum teleportation schemes utilize both resources to achieve what is impossible for either alone.”

Interesting!

  Perhaps I put to much credence in Nova..

Write4U - 03 December 2011 01:13 AM

  Perhaps I put to much credence in Nova..

I didn’t watch the show so can’t speak to what was said or not, but this is always a huge problem with science popularizers when they start on about stuff at the bleeding edge. Either they slip and say something that’s completely false because it sounds cool, or (often more likely with physicists) they say something that’s literally true but extremely easy to misconstrue as something that’s completely false. So always take the wide-eyed stuff with large grains of salt and try to verify it from other, high quality sources before accepting it.