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Old news. As the article says, this method of creating a space warp has been known for about 25 years. The problem is that naive calculations of the amount of energy required to warp space in the desired manner give a value larger than the Sun's total output.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
0. nothing in relativity suggests that spacetime cannot contract or stretch faster than light
1. nothing in physics says energy density can’t be negative
So all you have to do is both of those things, and Hey, Presto! FTL travel!
I feel I should point out the slightly bleeding obvious flaw in the reasoning -- the fact that no-one says that something can't happen doesn't mean that it can!
Often, if no-one says something can happen, it's because it can't. In this instance, for example, we use abstract determiners that were invented by people to quantify things (it's quite common to call them "numbers").
When working with numbers, it's really easy to make stupid suppositions, because the real world doesn't force numbers to behave like the non-abstract things that the numbers represent.
E.g. for point 1, solve this:
If you have five pounds of potatoes, and someone steals eight pounds of potatoes from you, how many pounds of potatoes are you left with?
You've got -3 pounds of potatoes.
Now perform the experiment with real potatoes, rather than abstract quantifiers (those "number" things, again), and send me a photo of what -3 pounds of potatoes looks like.
The only difference between doing this with potatoes and doing it with "energy density" is that if you do it with "energy density", and act all clever and intellectual, some people won't realise that you're a bleeding idiot.
I wanna be a eunuchs developer! Pass me a bread knife!
Just because you can't photograph it, does't mean that -3 pounds of potatoes isn't "real" - that's the idea that banking is based on; heck my bank account relied on it for years after I got out of Uni and trust me, I was assured often enough that that was for real!
Sent from my Amstrad PC 1640 Never throw anything away, Griff
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