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arXiv 1808.07598cond-mat.stat-mech
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随机散射体Henon-渗流景观中的Schramm-Loewner演化

Schramm-Loewner evolution in the random scatterer Henon-percolation landscapes

M. N. Najafi, S. Tizdast, J. Cheraghalizadeh

摘要:

Shcramm-Loewner演化(SLE)是一个相关的探索过程,其中对于弦设置,迹线的尖端以自回避的方式向无穷远演化。结果曲线命名为SLE $_κ$,强调该过程是由一个参数$κ$,共形不变的随机曲线进行分类控制。当经历一些环境缺陷或等效地一些散射随机点(其可以是吸收的或排斥的)时,该过程导致一些其他有效尺度不变曲线,这些曲线由其他有效分形维数和等效地其他有效扩散率参数$κ_{\text{effective}}$描述。本文利用经典的Henon映射在晶格上随机生成散射(吸收/排斥)点,实现了SLE迹与之相互作用的渗流晶格。我们发现一些有意义的幂律变化的分形维数(也是有效的扩散系数参数)的Henon耦合的强度,即$z$参数。为此,我们测试了曲线的分形维数以及左通过概率。我们的观察结果支持这样的事实:这种偏差(或等效的非零$z$)破坏了曲线的共形对称性。曲线的有效分形维数也随$z$的二次幂即$D_F(z)-D_F(z=0)\sim z^2$而变化。

英文摘要:

The Shcramm-Loewner evolution (SLE) is a correlated exploration process, in which for the chordal set up, the tip of the trace evolves in a self-avoiding manner towards the infinity. The resulting curves are named SLE$_κ$, emphasizing that the process is controlled by one parameter $κ$ which classifies the conformal invariant random curves. This process when experiences some environmental imperfections, or equivalently some scattering random points (which can be absorbing or repelling) results to some other effective scale-invariant curves, which are described by the other effective fractal dimensions and equivalently the other effective diffusivity parameters $κ_{\text{effective}}$. In this paper we use the classical Henon map to generate scattering (absorbing/repelling) points over the lattice in a random way, that realizes the percolation lattice with which the SLE trace interact. We find some meaningful power-law changes of the fractal dimension (and also the effective diffusivity parameter) in terms of the strength of the Henon coupling, namely the $z$ parameter. For this, we have tested the fractal dimension of the curves as well as the left passage probability. Our observations are in support of the fact that this deviation (or equivalently non-zero $z$s) breaks the conformal symmetry of the curves. Also the effective fractal dimension of the curves vary with the second power of $z$, i.e. $D_F(z)-D_F(z=0)\sim z^2$.

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