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Negative temperature: Understanding what happens below absolute zero

2013-01-08 21:55:03| Extremetech

Our familiar concept of temperature works pretty well for most solids, liquids, and gases -- it conforms to the general expectation that it should always be greater than absolute zero. What are we to make of a recent claim by a group of German researchers that they have created an experimental system where negative temperatures can be observed and measured?

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