I came across this rather interesting video on Matrioshka Brains that gives a bit of hard science on how something like this would work
https://www.youtube.com/watch?v=Ef-mxjYkllw
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A brave little theory, and actually quite coherent for a system of five or seven dimensions--if only we lived in one.
Academician Prokhor Zakharov
"Now We Are Alone"