Escort Density Operators and Generalized Quantum Information Measures
نویسنده
چکیده
Parametrized families of density operators are studied. A generalization of the lower bound of Cramér and Rao is formulated. It involves escort density operators. The notion of φ-exponential family is introduced. This family, together with its escort, optimizes the generalized lower bound. It also satisfies a maximum entropy principle and exhibits a thermodynamic structure in which entropy and free energy are related by Legendre transform.
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عنوان ژورنال:
- Open Syst. Inform. Dynam.
دوره 12 شماره
صفحات -
تاریخ انتشار 2005