So what would be the practical benefits of femto-technology, exactly? What would engineering machines and materials on the subatomic level do for us?
I think SG-1 probably has the best ideas for this topic. I haven't put a large amount of thought on what we could do below the level of atomic precision. Just at the scale of atoms and manipulating them to exact precision has an insane amount of potential and is enough to lead us to a Type I civilization, create super intelligence, etc.
I guess we could build antimatter?
The heat death of the Universe won't affect us if we can make protons faster than they decay.
Yes, we could build antimatter with this sort of technology, but it would not solve the heat death of the Universe. A proton has an unimaginably large lower boundary on lifetime... so it's not the sort of issue that we need to worry about right now. But it's not the proton decay that is worrisome--it's entropy and the expansion of space (Dark Energy increasing).
It's not conceivable with our understanding of physics that using this technology to rebuild the world as it decays and becomes more entropic as doing so would consume energy in the proccess, and only increase entropy.
Other than exploiting parallel universes and such, I don't see an out for solving entropy.
[...] fempto technology could make the Anti-matter factory a real possibility in order to supply for our energy consumption in the 22nd century
Again, as before, I believe we could use this technology to create antimatter. But doing so would cost energy, more than we would get out of it. It's likely that there was much more antimatter in the beginning of the universe, and that it annihilated with matter releasing energy.
My mind has been torn into Oblivion, is there a way to tear that too? Reach into the Oblivion, and through Zen, tear the Universe anew.
Tradesman by day, [game] programmer by night. Philosopher all day long. @Malgidus |Forest Bear Studios