I'm guessing you are referring to the concept known as "quantum foam". Like you said, theoretically there should be sub-atomic wormholes. However, we have never seen a sub-atomic wormhole, or detect one, so it's just mere speculation. I think to enlarge and sustain a wormhole you need exotic matter, though I'm not too sure on the specific details.
http://en.wikipedia.org/wiki/Wormhole#cite_note-naturalwormholes-7; look at the references if you feel iffy about the wikipedia article. Something about using "negative mass-energy" to enlarge the wormhole; I'm not that knowledgeable about physics, so I don't know. I got additional information from this link though:
http://hardsf.org/HSFTWor1.htm Finally, some information on negative mass. Frankly speaking, I didn't get much. Here it goes though:
http://www.concentric.net/~pvb/negmass.html. Have fun decoding it.
Anyways, psi does not behave in the same manner as physical energy does. I like this one member's way of labeling psi as a form of "subtle energy". Even adding the term energy is misleading. If it did behave the same as physical energy then I am sure scientists would have measured it by now. The only conclusion for psi to be true is that it is different than physical energy in order to exist. The only confusion that comes up if the following is true is trying to figure out what exactly happens when PK occurs. Anyways I have not heard of using psi as negative energy. To open up a wormhole might require lots of negative energy as well. It would quickly disintegrate due to the forces though, so it's just not worth it trying to widen a wormhole.
No offense, but I think the theory is horrible. It sounds impossible. Once again, even if psi is possible then the only type of energy it could manifest is positive energy, at least from what psions have attempted. Give it a shot, but I think it's a waste of time. How would you program a construct to even look for wormholes in the first place too?