热液体和冷气体的移动性诱导的共存
Lukas Hecht1, Iris Dong1, Benno Liebchen2
1Institute of Condensed Matter Physics, Department of Physics, Technical University of Darmstadt, Darmstadt, Germany.
Nature communications
|April 13, 2024
概括
在平衡系统中的活性粒子可以创建具有不同动力温度的共存相. 由于相关的粒子运动,密集阶段可能比稀释阶段更热或更冷.
科学领域:
- 物理 物理学 物理
- 统计力学 统计力学
- 软物质物理学 软物质物理学
背景情况:
- 均衡物理学规定,共存的相共享相同的温度.
- 最近的研究观察到,在具有自我推进粒子的非平衡系统中,温度差异很大.
- 像斯合体这样的系统中的自我组织阶段已经引起了大量的关注.
研究的目的:
- 为了调查是否可以在平衡系统中共存的相之间产生动力温度差异.
- 探索通用过度化自动运动粒子在创造这些温度差异中的作用.
- 要确定密集阶段是否可以比稀释阶段更热或更冷.
主要方法:
- 模拟过度化的活性和惯性被动布朗粒子混合物的模拟.
- 分析阶段分离到密集和稀释区域.
- 测量共存相中的运动温度.
主要成果:
- 观察到阶段分离为密度和稀释阶段.
- 在密度和稀释相同时存在时,发现了不同的动力温度.
- 发现密集阶段能够比稀释阶段更冷或更热.
- 相关运动,其中活性粒子影响被动粒子,被确定为关键机制.
结论:
- 同时存在的相之间的动态温度差异可以在具有活性粒子的平衡系统中实现.
- 密集阶段可以比稀释阶段表现出更高或更低的动力温度.
- 这种现象是由集体粒子动力学驱动的,为控制物质的热性质提供了新的可能性.
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