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arXiv 2203.07313math.PRmath.CV
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复布朗运动驱动的Loewner演化(由Minjae Park提供模拟)

Loewner evolution driven by complex Brownian motion (with simulations by Minjae Park)

Chicago(芝加哥大学);Columbia(哥伦比亚大学)

Ewain Gwynne, Joshua Pfeffer

AI总结:

本研究推广复参数SLE,提出由具有给定协方差矩阵的双布朗运动驱动的Loewner演化模型,证明其行为异于普通SLE且存在三种相,给出相边界的显式积分表达及零相关时的闭式解。

摘要:

我们研究驱动函数为$W_t = B_t^1 + i B_t^2$的Loewner演化,其中$(B^1,B^2)$是一对具有给定协方差矩阵的布朗运动。该模型可被视为复参数值Schramm-Loewner演化(SLE,施拉姆-勒夫纳演化)的推广。我们证明,这类Loewner演化的行为与普通SLE差异极大。例如,若$B^1$和$B^2$均不恒等于零,则被Loewner包壳与无穷远点断开的点集在每个时刻都具有非空内部。我们还证明,该模型呈现出与SLE的相类似的三种相:包壳勒贝格测度为零的相、点被包壳吞噬但未被击中的相,以及包壳是空间填充的相。相边界通过显式积分的符号表示。当两个布朗运动的相关性为零时,这些边界具有简单的闭式表达式。

英文摘要:

We study the Loewner evolution whose driving function is $W_t = B_t^1 + i B_t^2$, where $(B^1,B^2)$ is a pair of Brownian motions with a given covariance matrix. This model can be thought of as a generalization of Schramm-Loewner evolution (SLE) with complex parameter values. We show that our Loewner evolutions behave very differently from ordinary SLE. For example, if neither $B^1$ nor $B^2$ is identically equal to zero, then the set of points disconnected from $\infty$ by the Loewner hull has non-empty interior at each time. We also show that our model exhibits three phases analogous to the phases of SLE: a phase where the hulls have zero Lebesgue measure, a phase where points are swallowed but not hit by the hulls, and a phase where the hulls are space-filling. The phase boundaries are expressed in terms of the signs of explicit integrals. These boundaries have a simple closed form when the correlation of the two Brownian motions is zero.

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。

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