Negative temperature and Absolute zero

Below absolute zero

This may sound more unlikely than freezing hell, but physicists have created an atomic gas with a temperature below absolute zero for the first time. The technique opens the door to the production of Kelvin-negative materials and new quantum devices, and could even help solve a cosmological mystery.

Lord Kelvin defined the absolute temperature scale in the mid-19th century, proposing that nothing could be colder than absolute zero.

Physicists later realized that the absolute temperature of a gas is associated with the average energy of its particles. Absolute zero corresponds to the theoretical state where particles have no energy at all, and higher temperatures correspond to higher average energies.

I recently read the story in that magazine, and I was wondering if it's even possible to get to absolute zero, and she said she's gone beyond... doesn't that violate the energy time uncertainty principle? I do not understand

(Translate from Portuguese to English)


Browse other questions tagged or ask your own question.