What would be necessary to use "vacuum energy" to power anything in space?
by 
Egao No Genki
ANSWERS: 4
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To use "vacuum energy" to power anything in space, you would need an engine that utilizes vacuum energy to create power. We don't have one yet.
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I think we would first have to have a good, or better than the current, understanding of dark matter, and dark energy in general. It seems to be quite powerful.
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It'd be impossible, I think. The energy inherent to a vacuum is the zero point energy of the region, eg you cannot get any lower then that. Part of that therefore means you can not remove energy from it. You get virtual particle processes, etc, etc, and I think sometimes Hawking Radiation where it becomes real particles via interactions with blackholes, but I'd be very skeptical we could ever utilize it
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For fiction to be real. The vacuum would only be utilized by decompressing gasses into it to power a vehicle or turning a turbine and this is still far too inefficient to be used extensively
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