On maximum number of decoherent histories

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.

5 pages LaTeX (2nd version, new ref. included)

References in corpus (1)

• Classical Equations for Quantum Systems

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