Critical noncolorings of the 600-cell proving the Bell-Kochen-Specker theorem

Details Critical noncolorings of the 600-cell proving the Bell-Kochen-Specker theorem Critical noncolorings of the 600-cell proving the Bell-Kochen-Specker theorem

2009-11-12

arxiv.org/abs/0911.2289v2

J.Phys.A: Math. Theor. 43 (2010) 105304

Physics

Quantum Physics

2 new references added, caption to Table 9 corrected

Scientific paper

Aravind and Lee-Elkin (1997) gave a proof of the Bell-Kochen-Specker theorem by showing that it is impossible to color the 60 directions from the center of a 600-cell to its vertices in a certain way. This paper refines that result by showing that the 60 directions contain many subsets of 36 and 30 directions that cannot be similarly colored, and so provide more economical demonstrations of the theorem. Further, these subsets are shown to be critical in the sense that deleting even a single direction from any of them causes the proof to fail. The critical sets of size 36 and 30 are shown to belong to orbits of 200 and 240 members, respectively, under the symmetries of the polytope. A comparison is made between these critical sets and other such sets in four dimensions, and the significance of these results is discussed.

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