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Negative absolute temperature - Printable Version

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Negative absolute temperature - sandcastles - 01-29-2021

I read wikipedia's article on Negative Absolute Temperature.  It has to do with the level of entropy decreasing after a certain point.  I thought the concept was bizarre and freaky enough for Orions Arm.  It does happen in things like lasers; I wondered if this is worth pursuing here.  What new uses would archailects find for it?

RE: Negative absolute temperature - Cray - 02-03-2021

Interesting idea. Negative temperature systems are ones where entropy decreases as energy is added. Are there situations, perhaps high energy plasmas, where decreased entropy is useful?