Abstract
Measurements involving spin-1/2 meters which result in the simultaneous measurement of spin components are described. The spin analoge of the Arthur-Kelly experiment is contrasted with a simultaneous measurement which interacts with the system. Naimark extensions are constructed and Bloch state projection properties are discussed for each case. The theory is extended to squeezed angular momentum measurement.
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Levine, R.Y., Tucci, R.R. On the simultaneous measurement of spin components using spin-1/2 meters: Naimark embedding and projections. Found Phys 19, 175–187 (1989). https://doi.org/10.1007/BF00734524
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DOI: https://doi.org/10.1007/BF00734524