The article that you posted last night, mentions that one would need 10^42 joules of energy just to manipulate the 11th dimension...to give you an idea, 1 tonne of TNT explosion yields 10^8 joules of energy...so, you have to find a source which yields more than 5 times that amount energy.
This is actually off by a lot...10^9 joules is 10 times the energy of 10^8 joules; 10^10 joules is 10 times that, and so on. So you'd need a source that provides roughly 10,000,000,000,000,000,000,000,000,000,000,000 (phew!) times as much energy as your ton of TNT. This amount of energy would literally destroy the Earth, assuming it was anywhere near the energy when it was applied.
That's why, while theoretically it's not impossible to do such things, practically it's well beyond the bounds of everything we know to even attempt it.
There is a source of energy that is powerful enough to supply the required amounts, and it is
anti-matter, (and it has been created and acquired by accelerator). The current problem with anti-matter, is that it is produced in such incredibly small amounts, that it would, at present time and state of technology, take thousands of years to produce enough to use as energy for space-travel.
I believe
that, and the understanding of gravity and the "Theory of Everything", (s-string/membranes/11 dimensions, etc.), is only a matter of time. I also think that interstellar travel is not so much a matter of
speed as it is a matter of understanding the bending of space and manipulation of gravity to make large distances much smaller.