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arXiv 1409.7428cond-mat.stat-mech
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秩分布中$q$统计量的发生率

Incidence of $q$-statistics in rank distributions

G. Cigdem Yalcin, Alberto Robledo, Murray Gell-Mann

摘要:

我们发现,在大量的情况下,在一个广泛的家庭的系统服从Tsallis统计的幂律衰减(往往只在有限的程度上)的大小秩分布。这些分布的理论框架类似于切分叉附近的非线性迭代映射,其中李雅普诺夫指数可以忽略不计或为零。与这些分布相关的物理力学表达式来自最大熵原理,使用两种不同的约束,由此产生的熵指数的二元性被认为是描绘物理相关的信息。当指数$α$的值固定分布的幂律指数时,对偶指数$2-α$的值确保变形熵的扩展性。

英文摘要:

We show that size-rank distributions with power-law decay (often only over a limited extent) observed in a vast number of instances in a widespread family of systems obey Tsallis statistics. The theoretical framework for these distributions is analogous to that of a nonlinear iterated map near a tangent bifurcation for which the Lyapunov exponent is negligible or vanishes. The relevant statistical-mechanical expressions associated with these distributions are derived from a maximum entropy principle with the use of two different constraints, and the resulting duality of entropy indexes is seen to portray physically relevant information. While the value of the index $α$ fixes the distribution's power-law exponent, that for the dual index $2-α$ ensures the extensivity of the deformed entropy.

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