Silent night, hurried night
- Brötchen-und-Borussia

Chasing Santa Claus with (quantum) physics
Every year, one of us has a lot to do. But how does Santa manage to deliver mountains of presents to millions of children in just one day? And - the question may be asked - can he even exist? Precise calculations are used to reveal the mortal danger Santa Claus and his reindeer must face in order to fulfill his earth-spanning mission. It's the toughest job in the world! The reality check brings to light worrying results that are anything but contemplative. But don't worry: the
festival is not in danger!
Click here for the livestream.
![Band structure of 2D semimetal based on HgTe quantum well. Experimental points are obtained from the analysis of the cyclotron resonance in the quasi-classical approximation. Solid lines are predictions of the kp theory with no free parameters. Splitting of the conduction (e1,2) and valence (h1) band is due to the quantum confinement. [J. Gospodaric, AP, et al., PRB 104, 115307].](/storages/physik/_processed_/b/5/csm_Kolloquium_Pimenov_0fa7761647.png)





