Renormalizing the Kardar–Parisi–Zhang Equation in $$d\ge 3$$ in Weak Disorder

Renormalizing the Kardar–Parisi–Zhang Equation in $$d\ge 3$$ in Weak Disorder
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弱无序中 $$dge 3$$ 中 Kardar–Parisi–Zhang 方程的重整化

DOI:
10.1007/s10955-020-02539-7
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发表时间:
2019
影响因子:
1.6
通讯作者:
Chiranjib Mukherjee
Chiranjib Mukherjee
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
F. Comets;Clément Cosco;Chiranjib Mukherjee

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研究了在空间小卷积的高斯时空白色噪声驱动下的3维以上的Kardar-Parisi-Zhang方程.当噪声强度较小时,众所周知,当平滑参数关闭时,解会收敛到随机极限。我们确定这一限制,在一般的初始条件下,从平面到液滴。我们提供了严格遵守极限定律的解的强近似。我们证明了这个极限有次高斯下尾,这意味着存在所有的负(和正)时刻。
We study Kardar–Parisi–Zhang equation in spatial dimension 3 or larger driven by a Gaussian space–time white noise with a small convolution in space. When the noise intensity is small, it is known that the solutions converge to a random limit as the smoothing parameter is turned off. We identify this limit, in the case of general initial conditions ranging from flat to droplet. We provide strong approximations of the solution which obey exactly the limit law. We prove that this limit has sub-Gaussian lower tails, implying existence of all negative (and positive) moments.
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