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arXiv 1702.01336math-phcs.IThep-thmath.ITmath.MPquant-ph
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广义熵的唯一性和特征定理

Uniqueness and characterization theorems for generalized entropies

Alberto Enciso, Piergiulio Tempesta

摘要:

熵函数是可组合的要求是关键:这意味着复合系统的熵可以根据其独立分量的熵来计算。我们证明,在温和的正则性假设下,唯一的可组合的广义熵的痕迹形式是Tsallis单参数家庭(其中包含玻尔兹曼吉布斯作为一个特殊的情况)。这个结果导致了在复杂系统的研究中使用非迹形式的广义熵,如雷尼熵。在这个方向上,我们还提出了一个大类的可组合的非迹形式的熵函数与功能类似的雷尼熵的特征定理。

英文摘要:

The requirement that an entropy function be composable is key: it means that the entropy of a compound system can be calculated in terms of the entropy of its independent components. We prove that, under mild regularity assumptions, the only composable generalized entropy in trace form is the Tsallis one-parameter family (which contains Boltzmann-Gibbs as a particular case). This result leads to the use of generalized entropies that are not of trace form, such as Rényi's entropy, in the study of complex systems. In this direction, we also present a characterization theorem for a large class of composable non-trace-form entropy functions with features akin to those of Rényi's entropy.

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