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--- basic_notions:spin [2018/03/28 13:12]
jakobadmin
+++ basic_notions:spin [2019/02/07 13:05]
129.13.36.189 [FAQ]
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 <tabbox Intuitive>
+One of the biggest discoveries in the last century was that elementary particles have spin, which is some kind of internal angular momentum. This was discovered by the famous [[experiments:stern-gerlach|Stern-Gerlach experiment]].
+In abstract terms you can think about spin as a label that tells us how particles behave in experiments, exactly as the [[basic_notions:mass|mass]] or the electric [[basic_notions:charge|charge]]. For example, a particle with electric charge behaves different than one without in experiments and the same is true for spin.
+There are particles with spin $0$, particles with spin $\frac{1}{2}$ and particles with spin $1$. For each of these different particle types we have a different [[:equations|equation]]that describes their behavior.
+----
   * [[https://medium.com/starts-with-a-bang/spin-the-quantum-property-that-should-have-been-impossible-40bd52548b22|Spin: The Quantum Property That Should Have Been Impossible]] by Paul Halpern
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 and[[http://people.westminstercollege.edu/faculty/ccline/courses/phys425/AJP_54(6)_p500.pdf| What is spin?]] by HC Ohanian
+An interesting alternative perspective was put forward by Hestenes in his paper [[http://geocalc.clas.asu.edu/pdf/ZBW_I_QM.pdf|The Zitterbewegung Interpretation of Quantum Mechanics]]. In this paper he argues that spin arises due to the permanent zig-zag motion of electrons (and all other particles). This zig-zag motion is the result of permanent collisions with background Higgs bosons which cause chirality flips from left-chiral to right-chiral states.
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