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Physics 1994
On maximum number of decoherent historiesDOI: 10.1016/0375-9601(95)00440-E Abstract: It is shown that $N^2$ is the upper limit for the number of histories in a decohering family of $N$-state quantum system. Simple criterion is found for a family of $N^2$ fine grained decohering histories of Gell-Mann and Hartle to be identical with a family of Griffiths' consistent quantum trajectories.
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