03-04-2021, 08:36 PM
(03-04-2021, 09:11 AM)dangerous_safety Wrote: That only holds if superluminal travel allows for arbitrary speed. I would not be surprised if, should superluminal travel be possible, there exists some fundamental constraints on either the maximum and/or minimum velocity. If your superluminal drive can only get to 1.002 c, then its still superluminal, but not in any meaningful way. Similarly, if your superluminal drive can only go at speeds higher than 10^18 c, fine control will be nearly impossible.
Even if the constraint on superluminal travel was that the top speed were 1.002c, that would still be enough to create causal loops in some conceivable sets of frames of reference. Once you have created a closed time-like curve in this fashion, you can use it to send information both backwards and forwards in time, creating paradoxes of various kinds. This would be an undesirable consequence, I think.