Infinite-noise criticality: Nonequilibrium phase transitions in fluctuating environments
Infinite-noise criticality: Nonequilibrium phase transitions in fluctuating environments
复制标题
无限噪声临界性：波动环境中的非平衡相变
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. Hoyos
中科院分区：
文献类型：
--
作者：
T. Vojta;J. Hoyos
我们研究了时变环境噪声对扩散和生长过程中非平衡相变的影响。使用的例子的逻辑演化方程以及接触过程中，我们表明，这种时间的无序引起一种独特的类型的临界点，在该临界点上的有效噪声振幅发散长的时间尺度。这导致了巨大的密度波动，其特征是在临界状态下的无限宽的概率分布。我们开发了一个实时重整化群理论，提供了一个一般的框架，时间无序的非平衡过程的影响。我们还讨论了如何一般这种异国情调的临界行为，我们说明了计算机模拟的结果，我们触及我们的理论的实验应用。
We study the effects of time-varying environmental noise on nonequilibrium phase transitions in spreading and growth processes. Using the examples of the logistic evolution equation as well as the contact process, we show that such temporal disorder gives rise to a distinct type of critical points at which the effective noise amplitude diverges on long time scales. This leads to enormous density fluctuations characterized by an infinitely broad probability distribution at criticality. We develop a real-time renormalization-group theory that provides a general framework for the effects of temporal disorder on nonequilibrium processes. We also discuss how general this exotic critical behavior is, we illustrate the results by computer simulations, and we touch upon experimental applications of our theory.