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The Stern-Gerlach experiment showed that electrons are spinors. It was the first experimental observation of the elementary spin $\frac{1}{2}$ of fermions.
Via the Pauli exclusion principle/spin-statistics theorem, this implies that wavefunctions depending on fermionic variable commute with each other only up to a sign, forming a supercommutative superalgebra. This way the Stern-Gerlach experiment is ultimately the observation that physical reality is described by supergeometry.
(Notice that there is supergeometry independently of supersymmetry, which may or may not be present in addition).
Last revised on November 30, 2016 at 13:19:37. See the history of this page for a list of all contributions to it.