Re:The horizon problem for faster than light travel
by slowmovintarget on Thursday January 20, 2022 @06:28PM
(#30016936)
The quoted sentence has dropped the word "can't" I suspect.
Reworded: "Horizons pose an issue for warp drives as one cannot control the warp bubble if one can't see or communicate with it."
The problem, then, is that warp drives as posited create KVF horizons that would seem to make them impossible to control, enter, or leave. That would mean warp drive is not permitted in the universe.
Some KVF horizons, like the outer ergosphere of a black hole can be detected, entered, and exited. Conclusion, warp drives are not ruled out on the grounds that they involve horizons because we don't know what kind of horizon they might have.
Reworded: "Horizons pose an issue for warp drives as one cannot control the warp bubble if one can't see or communicate with it."
The problem, then, is that warp drives as posited create KVF horizons that would seem to make them impossible to control, enter, or leave. That would mean warp drive is not permitted in the universe.
Some KVF horizons, like the outer ergosphere of a black hole can be detected, entered, and exited. Conclusion, warp drives are not ruled out on the grounds that they involve horizons because we don't know what kind of horizon they might have.
tl;dr Warp drives aren't ruled out... yet.