Ergodic properties of microcanonical observables

被引：27

作者：

Giardina, C ^{[1
]}

Livi, R

机构：

[1] Univ Bologna, Dipartmento Fis, I-40126 Bologna, Italy

[2] Ist Nazl Fis Nucl, I-40126 Bologna, Italy

[3] Univ Florence, Ist Nazl Fis Nucl, Dipartimento Fis, I-50125 Florence, Italy

[4] INFM, Unita Firenze, I-40126 Bologna, Italy

来源：

JOURNAL OF STATISTICAL PHYSICS | 1998年 / 91卷 / 5-6期

关键词：

strong stochasticity threshold; ergodic hypothesis; microcanonical ensemble;

D O I：

10.1023/A:1023036101468

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The problem of the existence of a strong stochasticity threshold in the FPU-beta model is reconsidered, using suitable microcanonical observables of thermodynamic nature, like the temperature and the specific heat. Explicit expressions for these observables are obtained by exploiting rigorous methods of differential geometry. Measurements of the corresponding temporal autocorrelation functions locate the threshold at a finite value of the energy density, which is independent of the number of degrees of freedom.

引用

页码：1027 / 1045

页数：19

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