That's still energy though. Unless I am wrong about anti matter (matter and anti matter cancel each other out into nothing). What I mean is can you take nothing, flip a few switches and push a few buttons to fabricate matter and anti matter from the fabric of space.
If matter and anti matter can combine to cancel each other out, can your reverse the process to pull matter and anti matter from nothing? I ask in a theoretical sense, not weather we are currently capable or not.
Looking forward to your responses!