Consistent Histories and Quantum Reasoning

Details Consistent Histories and Quantum Reasoning Consistent Histories and Quantum Reasoning

1996-06-04

arxiv.org/abs/quant-ph/9606004v1

Physics

Quantum Physics

Latex, 31 pages

Scientific paper

10.1103/PhysRevA.54.2759

A system of quantum reasoning for a closed system is developed by treating non-relativistic quantum mechanics as a stochastic theory. The sample space corresponds to a decomposition, as a sum of orthogonal projectors, of the identity operator on a Hilbert space of histories. Provided a consistency condition is satisfied, the corresponding Boolean algebra of histories, called a {\it framework}, can be assigned probabilities in the usual way, and within a single framework quantum reasoning is identical to ordinary probabilistic reasoning. A refinement rule, which allows a probability distribution to be extended from one framework to a larger (refined) framework, incorporates the dynamical laws of quantum theory. Two or more frameworks which are incompatible because they possess no common refinement cannot be simultaneously employed to describe a single physical system.

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