arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2104.13313cond-mat.stat-mech
收藏

用大偏差理论研究相互作用系统的宏观决定性

Macroscopic Determinism in Interacting Systems Using Large Deviation Theory

Brian R. La Cour, William C. Schieve

摘要:

我们考虑具有大量确定性相互作用成分的系统的准确定性行为,$n$。这项工作扩展了以前的文件的结果[J.统计。99:1225-1249(2000)]以包括相互作用系统上的向量值可观测量。这里使用的方法,但是,显着不同的是,一个级别-1大偏差原则(LDP)的联合观测,而不是一个级别-2 LDP的经验分布,是采用。如前所述,我们在(可能是向量值的)宏状态的集合上寻找映射$ψ_{t}$,使得当宏状态在时间0被给定为$a_0$时,在时间$t$的宏状态是$ψ_{t}(a_0)$,随着$n$趋于无穷大,概率接近1。我们表明,这样的地图存在,并来自一个广义的动态自由能函数,后者是无处不在定义良好,有限的,可微的。我们讨论了$ψ_{t}$的一些一般性质有关的不可逆性问题,并以一个简单的相互作用晶格为例,得到了一个精确的宏观解。

英文摘要:

We consider the quasi-deterministic behavior of systems with a large number, $n$, of deterministically interacting constituents. This work extends the results of a previous paper [J. Stat. Phys. 99:1225-1249 (2000)] to include vector-valued observables on interacting systems. The approach used here, however, differs markedly in that a level-1 large deviation principle (LDP) on joint observables, rather than a level-2 LDP on empirical distributions, is employed. As before, we seek a mapping $ψ_{t}$ on the set of (possibly vector-valued) macrostates such that, when the macrostate is given to be $a_0$ at time zero, the macrostate at time $t$ is $ψ_{t}(a_0)$ with a probability approaching one as $n$ tends to infinity. We show that such a map exists and derives from a generalized dynamic free energy function, provided the latter is everywhere well defined, finite, and differentiable. We discuss some general properties of $ψ_{t}$ relevant to issues of irreversibility and end with an example of a simple interacting lattice, for which an exact macroscopic solution is obtained.

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。

↑