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arXiv 1804.06359cond-mat.stat-mechphysics.data-an
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超级统计和温度波动

Superstatistics and temperature fluctuations

F. Sattin

摘要:

超级统计学[C.贝克和脑电图Cohen,Physica A 322,267(2003)]是一种形式主义,旨在根据由与E共轭的密集热力学量β的函数P(β)加权的平衡正则分布的叠加来描述复杂的非平衡系统中的一般广延量E的统计性质。通常假设P(beta)由所考虑的系统的时空动力学决定。在这项工作中,我们通过例子表明,在满足超统计形式主义适用的所有条件的某些情况下,P(beta)实际上也受到E的测量方式的影响,因此不是系统的固有属性。

英文摘要:

Superstatistics [C. Beck and E.G.D. Cohen, Physica A 322, 267 (2003)] is a formalism aimed at describing statistical properties of a generic extensive quantity E in complex out-of-equilibrium systems in terms of a superposition of equilibrium canonical distributions weighted by a function P(beta) of the intensive thermodynamic quantity beta conjugate to E. It is commonly assumed that P(beta) is determined by the spatiotemporal dynamics of the system under consideration. In this work we show by examples that, in some cases fulfilling all the conditions for the superstatistics formalism to be applicable, P(beta) is actually affected also by the way the measurement of E is performed, and thus is not an intrinsic property of the system.

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