Nobelpreis-Koll. Prof. Dr. Reinhard Werner (Univ. Hannover): The end of the classical world: The 2022 Nobel Prize in Physics

Veranstalter:in : FB01, Prof. Dr. Claus Lämmerzahl
Ort : Hörsaal H3, GEb. NW1, Otto-Hahn-Allee
Beginn : 15. Dezember 2022, 16:00 Uhr
Ende : 15. Dezember 2022, 17:00 Uhr


 Prof. Dr. Reinhard Werner (Leibniz Univ. Hannover)

The end of the classical world: The 2022 Nobel Prize in Physics

Abstract: The 2022 Nobel Prize in Physics was awarded to John Clauser, Alain Aspect and Anton Zeilinger "for experiments with entangled photons, establishing the violation of Bell inequalities and pioneering quantum information science". I will recount the development leading up to Bell's inequalities and derive them from the point of view of what they say about classical descriptions. This will help to explain the flood of misleading "explanations" triggered by the prize: The prize this year is awarded precisely for the proof that simple classical explanations and pictures fail in microphysics. So in their own way the press releases about "spooky action at a distance" and the like illustrate this point.

The work of Einstein, Bell, and the prize winners was definitely not in the mainstream at the time. This changed with the  beginning of quantum information science in the early 90s, which was, however, mostly driven by advances in theory, like the discoveries of teleportation, quantum key distribution, and the possibility of quantum computing.