Re: opposite of relativistic time contraction

On 2008-03-15, Ben Crowell <crowell07@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
The WP article on Tipler cylinders was helpful. I was actually hoping
to find a method for time un-contraction that *wouldn't* also be a
technology for closed timelike curves.

Just rule in your story that CTCs are impossible due to vacuum
instability. It may well be true in the real world, so it's not much
of a stretch.


On the same topic of what you can do if you have access to exotic
matter, one possible solution to accelerating a black hole might be
to give it a magnetic monopole charge, and then accelerate it using
magnetic fields.

So then how do you accelerate whatever it is producing these fields?
You seem to have a potential problem of "turtles all the way down".
If you're accelerating a 10^17 kg black hole at 100 g, you need to
apply 10^20 N of force to something else in the opposite direction.
The minimum power requirements also rapidly get icky.

You could in theory fire The Mother Of All Lasers into the black hole.
10^29 W or so ought to give 100g acceleration. Aiming may be a bit of
an engineering difficulty, but I think we're well past the realm of
engineering limitations.


- Tim
.

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