Interesting thought. There was a post recently that had an experiment that caused the Bose-Einsten condensenate to happen at higher temperatures because of the shape of the containg cavity. I was wondering if anyone had achieved the Bose Nova effect using that procedure and Lithium atoms.
But then I also wonder if Hawkings has said that micro black holes evaporate in a flare of energy , couldn’t an advanced race inject matter at the same rate it is evaporating and convert matter to energy. Might be tricky.
If one could create an anti-gravitiational field you may be able to generate an artificial singularity that you could inject matter into at the same rate it is spewing out hawking radiation....
You would have to focus the anti-grav beam the same way they focus magnetic fields in hot fusion containment...
Not sure how efficient it would be...
Maybe if you used an electrolytically confined system of a Bose Einstein condensate and inject small globs of Bose Einstein condensate to “feed” it....