# Berlin 2014 – wissenschaftliches Programm

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# AGPhil: Arbeitsgruppe Philosophie der Physik

## AGPhil 4: Quantum-Classical Divide II

### AGPhil 4.2: Vortrag

### Donnerstag, 20. März 2014, 14:45–15:15, SPA SR22

*Umdeutung:*** The Development of Quantum Mechanics as a Process of Reinterpretation.** — •Christoph Lehner — Max-Planck-Institut für Wissenschaftsgeschichte, Berlin

In 1925, Werner Heisenberg famously entitled his first paper on what was soon to be known as matrix mechanics "On the quantum theoretical reinterpretation (*Umdeutung*) of kinematic and mechanical relations." In my talk, I will analyze the centrality of this reinterpretation for the development of the new theory and for understanding the relation of matrix to classical mechanics. I will also consider the development of wave mechanics by Erwin Schrödinger in 1926 and analyze it as a parallel process of reinterpretation.

I will argue that this model offers a more realistic picture of the change of foundational theories than Kuhn’s model of paradigm change.