Nonequilibrium invariant measure under heat flow.
Nonequilibrium invariant measure under heat flow.
复制标题
热流下的非平衡不变测度。
DOI：
10.1103/physrevlett.101.120604
复制
发表时间：
2008
影响因子：
8.6
通讯作者：
A. Politi
中科院分区：
文献类型：
--
作者：
L. Delfini;S. Lepri;R. Livi;A. Politi
我们提供了一个显式表示的非平衡不变测度的谐振子链的保守噪声中存在的稳态热流。通过首先确定的协方差矩阵，我们能够表示的措施，作为产品的高斯分布对齐沿着一些集体模式，空间本地化的幂律尾巴。数值研究表明，这样的表示也适用于一个纯粹的确定性模型，四次费米-帕斯塔-乌拉姆链。
We provide an explicit representation of the nonequilibrium invariant measure for a chain of harmonic oscillators with conservative noise in the presence of stationary heat flow. By first determining the covariance matrix, we are able to express the measure as the product of Gaussian distributions aligned along some collective modes that are spatially localized with power-law tails. Numerical studies show that such a representation applies also to a purely deterministic model, the quartic Fermi-Pasta-Ulam chain.