Negative Temperatures That Are Hotter Than the Sun

6:31 minutes

Scientists have cooled potassium gas to one billionth of a degree below absolute zero. But in the quantum world, that’s actually hotter than the Sun. It’s hotter, even, than infinity degrees Kelvin. Vladan Vuletić, a quantum physicist at MIT, talks about this ‘Bizarro World’ temperature.

Segment Guests

Vladan Vuletić

Vladan Vuletić is a quantum physicist at the Massachusetts Institute of Technology in Cambridge, Massachusetts.

Meet the Producer

About Christopher Intagliata

Christopher Intagliata is Science Friday’s senior producer. He once served as a prop in an optical illusion and speaks passable Ira Flatowese.