Systems at negative temperature are, in a way, hotter than infinite temperature. Yet, the contain much less energy than the same system at a very large (or appr

Systems at negative temperature are, in a way, hotter than infinite temperature. Yet, the contain much less energy than the same system at a very large (or approaching infinite) temperature would contain. They are, after all, created in a lab, so their energy content is limited by how much electricity the lab equipments has consumed.