Quantum Entanglement and time travel

[MattE]

I'm not too sure the question really was ever answered. To put it fairly simple, we don't really know. The idea of why it is believed to violate special relativity is that entanglement means that objects that are interacting will react at the same time when something happens to one of the objects no matter how far away the two objects are. But this would mean that some sort of signal would have to be interacting with both objects and would be moving faster than the speed of light. This is where the paradox comes from, if the reaction happens instantly than the signal is moving faster than the speed of light and violated special relativity, unless the signal moves backwards through time.

 

[Demystifier]

Motions/signals faster than light do not violate special relativity.
Motions/signals backwards in time are not forbidden.
To understand why, see:
http://xxx.lanl.gov/abs/1002.3226
http://xxx.lanl.gov/abs/1006.1986