Density conditions for quantum propositions
arXiv:1108.5339 · doi:10.1063/1.531738
Abstract
As has already been pointed out by Birkhoff and von Neumann, quantum logic can be formulated in terms of projective geometry. In three-dimensional Hilbert space, elementary logical propositions are associated with one-dimensional subspaces, corresponding to points of the projective plane. It is shown that, starting with three such propositions corresponding to some basis , successive application of the binary logical operation generates a set of elementary propositions which is countable infinite and dense in the projective plane if and only if no vector of the basis is orthogonal to the other ones.