三维的临界运动性诱导相位分离与Ising普遍性是一致的
Jiechao Feng1, Daniel Evans2, Ahmad K Omar2,3
1University of California, Berkeley, Graduate Group in Applied Science & Technology, California 94720, USA.
Physical review. E
|December 23, 2025
概括
这项研究使用模拟活跃的布朗硬球来研究关键的活性相过渡. 结果显示指数与3D Ising普遍性类相匹配,表明与被动流体的相似之处.
科学领域:
- 物理 物理学 物理
- 软物质物理学 软物质物理学
- 统计力学 统计力学
背景情况:
- 关键的活性相过渡是最近科学兴趣和辩论的主题.
- 确定这些过渡的普遍性类需要强大的数值模拟.
研究的目的:
- 解决有关活跃相位转换的争议.
- 为了调查活跃的关键指数是否与新的或已建立的普遍性类别保持一致.
主要方法:
- 进行了动力诱导相分离 (MIPS) 的大规模计算机模拟.
- 在三维 (3D) 活跃的布朗硬球上进行了有限大小的缩放分析.
- 在关键动力学中使用波动性水力动力学描述.
主要成果:
- 静态和动态的临界指数与3D Ising普遍性类的临界指数密切匹配.
- 顺序参数场的临界动态流向3D中的威尔逊-菲舍尔固定点.
- 3D MIPS和活跃的布朗硬球相图类似于分子被动流体的相图.
结论:
- 这些发现表明3D MIPS属于3D Ising普遍性类.
- 活跃系统可以表现出类似于被动系统的行为,尽管缺乏博尔兹曼统计.
- 这项工作提供了对活跃相位过渡的强有力的数值调查.
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