The Hamiltonian mean field model: anomalous or normal diffusion?

被引：0
|
作者：
Antoniazzi, Andrea [1 ]
Fanelli, Ducclo [2 ]
Ruffo, Stefano [1 ]
机构：
[1] Univ Florence, Dipartimento Energet S Stecco, Via S Marta 3, I-50139 Florence, Italy
[2] Univ Manchester, Sch Phys & Astron, Theoret Phys, Manchester M13 9PL, Lancs, England
来源：
COMPLEXITY, METASTABILITY AND NONEXTENSIVITY | 2007年 / 965卷
关键词：
Hamiltonian dynamics; anomalous diffusion;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We consider the out-of-equilibrium dynamics of the Hamiltonian Mean Field (HMF) model, by focusing in particular on the properties of single-particle diffusion. As we shall here demonstrate analytically, if the autocorrelation of momenta in the so-called quasi-stationary states can be fitted by a q-exponential, then diffusion ought to be normal for q < 2, at variance with the interpretation of the numerical experiments proposed in Ref. [1].
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页码：122 / +
页数：3
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