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从具有隐藏状态的活性粒子中提取最佳功率
Luca Cocconi1,2, Jacob Knight2, Connor Roberts2
1The Francis Crick Institute, London NW1 1AT, United Kingdom.
Physical review letters
|November 17, 2023
概括
我们发现了利用反控制从活性粒子中提取能量的最佳方法,即使只观察它们的运动,而不是它们的力. 这些方法甚至适用于简单的粒子模型.
科学领域:
- 物理 物理学 物理
- 统计力学 统计力学
- 活动物质 活动物质
背景情况:
- 活性粒子表现出由内部能量来源驱动的复杂动力学.
- 反控制为操纵和利用活性物质系统中的能量提供了一条途径.
- 观测的局限性,例如无法获得的自我推进力,在控制活性粒子方面带来了挑战.
研究的目的:
- 从单个活性粒子中提取最佳功率的通用协议.
- 为了探索在持续反控制下进行功率提取,并进行有限的观察.
- 为了建立活性物质发动机性能的理论界限.
主要方法:
- 利用贝叶斯的方法与Onsager-Machlup路径积分形式主义相结合.
- 将框架应用于特定的模型:自由运行和落以及1D中的Ornstein-Uhlenbeck活跃动态.
- 假设只有空间轨迹是可观察的,而不是即时的自我推进力.
主要成果:
- 衍生出通用协议,以获得最佳的功率提取.
- 即使在具有时间对称轨迹和零信息产生的模型中,也证明了积极的工作提取.
- 建立了活性粒子系统的理论性能极限.
结论:
- 通过在部分观察下进行反控制,可以实现最佳的功率提取.
- 开发的协议为现实的活性物质发动机提供了一个基准.
- 提供了对来自非平衡系统的能源采集的洞察.
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