/sci/ - Science & Math

>>2644719
God, I love this picture.
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An example is quantum entanglement, which is instantaneous. However, no information can ever be transmitted through here (re: No-Communication theorem) because the changes that are made are indistinguishable from the normal random fluctuations in QM.

Theoretical treatments of Tachyons are also, ironically, purely STL. Although tachyons themselves are FTL, tachyonic "detection" and tachyonic "emission' are one and the same thing, meaning that a tachyon detector always produces a positive result, and you have no way of distinguishing "false positives" from "true positives", meaning that it can never send or receive any information.

So, top down we have GR explicitly forbidding FTL. Bottom up, QM has no rule forbidding it, but despite that, is complaint with the "No FTL rule", assuming you understand it to mean "information may never travel beyond the speed of light". There is no real reason why it should obey that if FTL travel really was possible. But it does. And it would be the strangest thing in the world if all scientific theories were conspiring to forbid us from going FTL, but then suddenly we found something that could do it no problems.

Picture awesome but unrelated.