Phys. Rev. Lett. 88, 240402 (2002) [4 pages]Kochen-Specker Theorem for Finite Precision Spin-One MeasurementsReceived 12 November 2001; published 29 May 2002 Unsharp spin-one observables arise from the fact that a residual uncertainty about the actual orientation of the measurement device remains. If the uncertainty is below a certain level, and if the distribution of measurement errors is covariant under rotations, a Kochen-Specker theorem for the unsharp spin observables follows: There are finite sets of directions such that not all the unsharp spin observables in these directions can consistently be assigned approximate truth values in a noncontextual way. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.240402
DOI:
10.1103/PhysRevLett.88.240402
PACS:
03.65.Ud, 03.65.Ta, 03.67.Hk, 03.67.Lx
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