wedrifid comments on [SEQ RERUN] Living in Many Worlds - Less Wrong

2 Post author: MinibearRex 28 May 2012 07:03PM

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Comment author: wedrifid 29 May 2012 04:56:42PM 0 points [-]

Your hypothetical has nothing to do with quantum mechanics or many worlds, and everything to do with special relativity.

Special relativity hangs out in a nice, flat, well behaved, Minkowski space where this sort of thing cannot happen. It takes general relativity and specifically a universe with accelerating expansion (such as ours probably is).

Comment author: Alejandro1 29 May 2012 09:16:57PM *  0 points [-]

It can also happen in flat space, e.g. if you and the other agent are on Rindler trajectories accelerating in opposite directions, then nothing that one of you does can affect the other.