Foundations of Physics 7 (9-10):705-721 (1977)

Abstract
Part I of the present work outlined the rigorous application of information theory to a quantum mechanical system in a thermodynamic equilibrium state. The general formula developed there for the best-guess density operator $\hat \rho$ was indeterminate because it involved in an essential way an unspecified prior probability distribution over the continuumD H of strong equilibrium density operators. In Part II mathematical evaluation of $\hat \rho$ is completed after an epistemological analysis which leads first to the discretization ofD H and then to the adoption of a suitable indifference axiom to delimit the set of admissible prior distributions. Finally, quantal formulas for information-theoretic and thermodynamic entropies are contrasted, and the entire work is summarized
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DOI 10.1007/BF00708590
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Mutually Exclusive and Exhaustive Quantum States.James L. Park & William Band - 1976 - Foundations of Physics 6 (2):157-172.

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