From what Fel has written so far, PPGs currently in use don't use any pocket universes. They use spacial warping to create an area smaller on the outside than it is on the inside. It's still part of your universe.
Even if it were possible to create such a pocket universe, creating them just for making high-density alloys or similar is unnecessary. They already have the gravimetric technology to create high or low gravity fields and insulate them from leaking through (you wouldn't want any high gravity field from pulling stuff into it from the outside of it).
But extending on that idea would be creating elements above replication abilities (they're limited to anything below silver). Since they need a fusion reaction to generate them, small bubbles similar to those used in PPGs, where the fusion reaction is kept alive and forced through high gravity/pressure could produce materials otherwise not easily accessible.
Now about anything but matter on an elemental level, as has been suggested by using such pocket universes to hide a base or weaponry. This is a very tricky thing. Because of the nature of them, getting anything but energy or atomic elements out of it would not just require a sufficiently large enough window, but the bubble would also have to be in the same state as ours, effectively merging them. No shortcuts with high gravity or density inside the bubbles. Besides, you'd have to hide those bubbles from detection (and yes, the Faye can detect them, that's why they know a PPG is active or such).
And truly, there's no need to hide anything behind something that is already hidden. Jason has already done that for most of the part.
Weaponry, ah yes, the big ol' guns. Warping space though isn't easy. And it needs tons of energy. It's why small ships don't have jumpgates, they can't supply enough power to open the wormholes. Creating weaponry based on doing that in any form requires a sufficiently large energy input. At some point, yes, it could happen, but in the current Subjugation universe Earth, and especially Jason just don't have the tools to do that.
Heh, and now to the Startrek energy, Anti-Matter. It's probably unlikely that none of the civilizations out there use it, but before you can ever use anti-matter for creating energy, you have to create the anti-matter. Whereas with the plasma systems in use, all you need is some hydrogen that's already readily available. And even if you manage to create it, it does bear the question if anti-matter reactors could provide the same energy output a current PPG does. Anti-matter just isn't quite the same as plasma.
Plasma is ionized (or charged) gas that is dense enough to enter a plasma state. Anti-matter on the other hand is the reverse of matter. It has positively charged electrons (positrons) and negatively charged protons.
Whereas plasma can be directly used in the many applications the Faye have for it, anti-matter can't. It first has to be converted to energy by exposing matter and anti-matter to each other, which then generates energy, most notably in the form of light and heat. And that energy then has to be utilized to do whatever you want, and even in star trek it ends up fueling a plasma system
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Now for a little fun with the telepathy discussion. A while ago I watched a lecture about recent findings in biology, and how it's not the DNA that controls the function of a cell, but is merely a blueprint for it. What really controls a cell is the 'skin' that covers it, or more specifically, protein 'antennaes', receptors that pierce through it and react to different inputs, for example by opening tunnels through the membrane of the cell that can pass molecules or atoms through, or by telling the cell inside to do something specific. One of the interesting parts is that these protein receptors also react to certain energy frequencies. Yep, there you have it, telepathy on a platter
![Razz :P](./images/smilies/icon_razz.gif)
The complex thing of course is the amount of proteins. In Subjugation, the Faye use Alpha Brainwaves as an indicator for the use of telepathy, simply because when the brain is active in such a way, it generates those alpha waves.
Now the trick to detect, disrupt, generate, or read telepathy through a machine is to tune in to the right energy frequencies. And energy isn't just electromagnetic waves
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Those protein receptors could also allow for the quick regeneration or repair of tissues when exposed to the right energy.
I think something that would benefit Jason more though, would be something that doesn't require battlecruisers to provide enough power, or multiple masters degrees in advanced biology, but rather ingeneous inventions that need very few ressources, and lots of thinking outside the box
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