与热浴接触的跑动粒子的稳定状态和放松动态
1Ben-Gurion University of the Negev, Department of Biomedical Engineering, Be'er Sheva 85105, Israel.
Physical review. E
|August 1, 2025
概括
这项研究揭示了在特定电位中的运行和动粒子 (RTP) 在放松过程中分裂成两个不同的模式. 一种模式占主导地位,而快速放松的少数模式影响产量.
科学领域:
- 统计力学 统计力学
- 非平衡的物理 物理学
- 活动物质 活动物质
背景情况:
- 运行和的粒子 (RTP) 是活性物质的基本模型.
- 了解非平衡系统中的放松动态至关重要.
- 零碎的线性电位为研究粒子行为提供了一个可处理的,但非微不足道的系统.
研究的目的:
- 为了研究一个运行和的粒子 (RTP) 的放松动态,在一个断片线性电位中.
- 在热和活性噪声下分析RTP的稳定状态分布和放松时间.
- 探索新出现的双模分布与非平衡生成之间的联系.
主要方法:
- 模拟一个RTP在一个U(x) =b的RTP潜力与三角函数的初始条件.
- 整合了热浴中的活性电报噪声和白色热噪声.
- 分析出现的位置分布及其分解成两个不同的模式.
- 计算每个模式的特征放松时间和有效传播速度.
主要成果:
- 稳定状态位置分布的RTP是两个模式的总和,P(x,t→∞)∼e^{-λ_{i}
- 起初,概率均等地分裂和扩散;后来,一种模式占主导地位.
- 放松乘以 τ_{i}=(λ_{i}^{2}T) ^{-1} 表示少数模式的放松速度更快.
- 远离原点,放松前线以v_{i}^{*}=2sqrt[T/τ_{i}]的速度传播.
结论:
- 这种电位中的RTP的放松动态以双模式分裂为特征.
- 模式之间的相互作用决定了稳态和生产的方法.
- 该模型提供了关于活跃和热波动如何塑造粒子分布和动态的见解.
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