阶段顺序的超均性:活动,噪音和非恒定移动性的作用
Filippo De Luca1, Xiao Ma1, Cesare Nardini2,3
1DAMTP, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, United Kingdom.
概括
阶段分离流体中的超均性表现出结构因子指数为4. 动态噪声引入了2的过渡指数,它可以在活跃系统和一个维中持续存在.
科学领域:
- 统计物理 统计物理
- 软物质物理学 软物质物理学
- 流体动力学 流体动力学
背景情况:
- 超均是一种无序的状态,抑制了大规模的密度波动.
- 阶段分离液体在它们的粗化状态中表现出超均性.
- 之前的研究确定了被动系统中超均性的结构因子指数 (ς) 为4.
研究的目的:
- 扩大对超均指数的理解,包括活性相分离和非恒定移动性.
- 调查动态噪声对超均度扩展的影响.
- 解释在活性流体中对=2状态的实验观测.
主要方法:
- 基于托米塔分析的分析缩放参数.
- 将论点扩展到主动系统和可变流动性.
- 分析动态噪声效应和交叉现象.
- 连续理论的数值模拟 (决定性和随机模型B).
主要成果:
- 确认 ς=4 对于主动相隔离和非恒定移动性.
- 鉴定了一种由于噪声而过渡的ς=2模式,过渡到ς=4.
- 证明了 ς=2 方案可以在活性流体 (d>=2) 中长期存在,并在 1D 中持久.
- 噪声诱导的交叉波向量取决于噪声方差 (D) 和粗化指数 (ν).
结论:
- 动态噪声在确定观察到的超均指数方面发挥着至关重要的作用.
- 在 1D 中的 ς=2 状态的持久性表明它不仅仅是由零温度固定点决定的.
- 质量中心的保存定律可能会影响超均现象.
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