发帖
雷达卡
摘要翻译：
用灵敏的偏振干涉仪测量了液晶指向矢的取向起伏，它接近于电场驱动的二阶跃迁Fr\'Eedericksz跃迁。我们证明了在场的临界值附近，空间平均序参量不是高斯分布，而是广义的Gumbel分布。后者是在远离临界点的情况下恢复的。指出了慢模态的相关性。广义Gumbel的参数与有效自由度数有关。
---
英文标题：
《Experimental evidence of non-Gaussian fluctuations near a critical point》
---
作者：
Sylvain Joubaud (Phys-ENS), Artem Petrosyan (Phys-ENS), Sergio
Ciliberto (Phys-ENS), Nicolas Garnier (Phys-ENS)
---
最新提交年份：
2008
---
分类信息：
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
--
一级分类：Physics 物理学
二级分类：Soft Condensed Matter 软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
--
---
英文摘要：
The orientation fluctuations of the director of a liquid crystal are measured, by a sensitive polarization interferometer, close to the Fr\'eedericksz transition, which is a second order transition driven by an electric field. We show that near the critical value of the field the spatially averaged order parameter has a generalized Gumbel distribution instead of a Gaussian one. The latter is recovered away from the critical point. The relevance of slow modes is pointed out. The parameter of generalized Gumbel is related to the effective number of degrees of freedom.
---
PDF链接：
https://arxiv.org/pdf/802.1839
京公网安备 11010802022788号
