The Brownian Castle

The Brownian Castle
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布朗尼城堡

DOI:
10.1002/cpa.22085
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发表时间:
2022
影响因子:
3
通讯作者:
Cannizzaro G
Cannizzaro G
中科院分区:
数学1区
文献类型:
--
作者:
Cannizzaro G

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我们引入了一个1+1维的温度相关模型,使得经典的弹道沉积模型恢复为零温度极限。它的∞-温度版本,我们称之为0-弹道沉积(0-BD)模型,是一个随机演化的界面,令人惊讶的是,它不属于爱德华-威尔金森(EW)或卡达尔-帕里西-张(KPZ)普适类。我们证明了0-BD有一个标度极限,一个新的随机过程,我们称之为布朗城堡(BC),虽然它是“自由的”,但与EW不同,并且像任何其他重整化不动点一样,是标度不变的,在这种情况下,在1:1:2标度下(而不是KPZ的1:2:3和EW的1:2:4)。在本文中,我们不仅导出了它的有限维分布,而且还提供了布朗城堡的“全局”构造,其优点是突出了它承认(后向)布朗网给出的后向特征的事实(见[37,16])。除其他外,这种特性使我们能够建立良好的路径属性的BC,并将这些特殊点的Web。我们证明了布朗城堡是一个适当的càdlàg函数空间上的(强)马尔可夫和费勒过程,并确定了它的长时间行为。最后,我们通过证明0-BD到BC的收敛性,在一个相当强的意义上,我们可以看到它的普适性。© 2022作者。纯粹与应用数学通讯由Wiley Periodicals LLC出版。
We introduce a 1+1‐dimensional temperature‐dependent model such that the classical ballistic deposition model is recovered as its zero‐temperature limit. Its ∞‐temperature version, which we refer to as the 0‐Ballistic Deposition (0‐BD) model, is a randomly evolving interface which, surprisingly enough, doesnotbelong to either the Edwards–Wilkinson (EW) or the Kardar–Parisi–Zhang (KPZ) universality class. We show that 0‐BD has a scaling limit, a new stochastic process that we callBrownian Castle(BC) which, although it is “free”, is distinct from EW and, like any other renormalisation fixed point, is scale‐invariant, in this case under the 1:1:2 scaling (as opposed to 1:2:3 for KPZ and 1:2:4 for EW). In the present article, we not only derive its finite‐dimensional distributions, but also provide a “global” construction of the Brownian Castle which has the advantage of highlighting the fact that it admits backward characteristics given by the (backward) Brownian Web (see [37, 16]). Among others, this characterisation enables us to establish fine pathwise properties of BC and to relate these to special points of the Web. We prove that the Brownian Castle is a (strong) Markov and Feller process on a suitable space of càdlàg functions and determine its long‐time behaviour. Finally, we give a glimpse to its universality by proving the convergence of 0‐BD to BC in a rather strong sense. © 2022 The Authors.Communications on Pure and Applied Mathematicspublished by Wiley Periodicals LLC.
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