By a counter-example, we show that the set of the three spin components Sx, Sy, Sz of spin-1 systems is not informationally complete.
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P. Busch and P. J. Lahti, “The determination of the past and the future of a physical system in quantum mechanics,”Found. Phys. 19, 633–678 (1989).
W. Stulpe and M. Singer, “Some remarks on the determination of quantum states by measurements,” preprint submitted for publication inFound. Phys. Lett.
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Singer, M., Stulpe, W. Informational incompleteness of the observablesS x ,S y ,S z for spin-1 systems. Found Phys 20, 471–472 (1990). https://doi.org/10.1007/BF00731714
- Spin Component
- Informational Incompleteness