Negative absolute temperatures are a fascinating and counterintuitive concept. ❄

Negative temperatures do not occur in classical systems; they are seen only in certain quantum systems.
We've used the Boltzmann distribution framework to explain temperature and thermal distribution because it provides an easytounderstand basis and avoids going into complexities. However, the distribution will be based on BoseEinstein or FermiDirac distributions in quantum systems with negative temperatures. The discussion of negative temperatures in terms of the Boltzmann distribution is still relevant because it provides a simplified framework for understanding the concept of negative temperatures.

This video is heavily based on information provided in the article https://www.quantummunich.de/119947/....

Music by Aleksey Chistilin from Pixabay
Audio File URL:
https://pixabay.com/music/beautifulp...

0:00 Introduction to video
1:03 Entropy and temperature
7:10 Is our universe at Negative temperature?