arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.2596cond-mat.stat-mechphysics.data-an
收藏

非平衡涨落统计的第一步唯象学

A first step phenomenology for the statistics of non-equilibrium fluctuations

Guillaume Attuel

摘要:

本文评估了平衡系统中的平稳概率分布。在提出的唯象学中,没有自由能可以很好地定义。朗道自由能耦合的涨落出现时,内在的化学势导致内在的无序。松弛的几何随机过程的形式。这类系统的临界特性,以及一阶跃,封装在一个广义的静态波动耗散关系的形式。这将有助于确定三类分布,通过定义弛豫速率的赫斯特指数:对于所有H < 1/2的正则麦克斯韦-玻尔兹曼分布;对于H在[1/2,1]中的幂律尾部的通常无标度普适分布;以及一个新的类。后者是在中间的情况下,当H = 1/2。分布函数在原点附近是无标度的,并且与麦克斯韦-玻尔兹曼渐近行为交叉,标度指数和有效温度都取决于内在无序的大小。

英文摘要:

The paper assesses stationary probability distributions in out of equilibrium systems. In the phenomenology proposed, no free energy can be well defined. Fluctuations of Landau free energy couplings arise when the intrinsic chemical potential leads to intrinsic disorder. The relaxation is shown to take the form of a geometrical random process. Systems of this kind show criticality features as well as that of first order transitions, which encapsulate in the form of a generalized static fluctuation dissipation relation. This will help determine three classes of distributions, which are, by defining a Hurst exponent for the relaxation rate: the regular Maxwell-Boltzmann for all H < 1/2; the usual scale free universal distributions with power law tails for H in ]1/2,1]; and a new class. The latter lies in the intermediate case, when H = 1/2. The distribution functions are scale free close to the origin, and cross-over to a Maxwell-Boltzmann asymptotic behavior, with both the scaling exponent and an effective temperature that depend on the magnitude of the intrinsic disorder.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑