Alcubierre drive
Posted: Posted December 5th, 2019 by chiarizio
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Who here among us has put any thought, study, research, simulation, or such work, into using Mexican physicist’s Alcubierre’s ideas into an “apparently superliminal” spacecraft-drive that would allow a spacecraft to cover a given distance in less time than one would expect given the ordinary speed-of-light in an ordinary vacuum, without ever traveling faster than the local speed-of-light in its own neighborhood?

The idea is that mathematically consistent locally-distorted space could have such a metric that something could cross it in less total time than a ray of light could cross an equivalent volume of ordinary vacuum. And that a spacecraft could carry an engine that would cause such a distortion in a volume of space surrounding the ship.

Needless to so no-one has proven that could be done in real life.
1. As of my latest reading no-one has proven that it’s mathematically ruled impossible given the General and Special Theories of Relativity
2. Alcubierre has suggested that “Casimir vacuum” could be such a distortion of space.

So it’s less speculative than magic; although it’s pretty darn speculative! Or at least I think Alcubierre inter alia says so.

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All you really need is some kind of setup that generates black holes -- those can warp spacetime even at less-than-stellar masses -- in fact the smallest possible mass is around that of a flea egg (21mcg). The tricky part is actually creating the black hole.

Posted December 6th, 2019 by Xhin
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Full speed ahead

Alcubierre pointed that out too. I reckon I’d be interested in any way to get an FTL drive. But in this thread I’m particularly interested in “virtual FTL” that manages to never violate the LOCAL speed limit; Alcubierre drive or other. I’m not sure the black-hole thing counts? (I’m not sure it necessarily doesn’t count, either.)

Alcubierre also discussed traversible wormholes. He wasn’t close-minded on how to get from point A to point B in less time than an ordinary photon traveling through an ordinary vacuum.
It’s just that one of the notions he talked/wrote about was named after him.
There do indeed appear to be possibly-realistic states of space in which the “apparent” or “virtual” speed-of-light exceeds (or appears to virtually exceed) 300,000 kilometers per second. Alcubierre’s drive would create such a state ahead of a craft, and do the reverse behind the craft, so that it would never exceed the local speed-of-light in its own neighborhood.

I know that in RL even if it were theoretically possible it might remain forever impractical.


Anyhow; thanks for the info about mini black holes!

Posted December 6th, 2019 by chiarizio
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I don’t think this is back in Math Sci Tech yet!
Or Worldbuilding either!
Am I wrong?

Posted Very Early Yesterday by chiarizio
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