Daniel Terno - Spin, localisation and uncertainty relations

Abstract: Defining a relativistic position operator poses significant challenges, even without considering particle creation and annihilation. The solution involves using positive operator-valued measures (POVMs), though they are not unique. This non-uniqueness also affects the relativistic generalization of non-relativistic spin. In this talk, I will describe POVMs for scalar particles, photons, and spin-1/2 fermions, focusing on their properties and potential experimental relevance. Finally, I will highlight recent work addressing these (sloppily-defined) operators in a rigorous manner.
Talk page: researchsemina...
3C-QFS, 30 July 2024