摘要：Spontaneous oscillation in particle numbers has been reported recently, in which two chambers connected by a narrow channel are alternately filled and emptied by self-propelled particles. The challenge in realizing the application of this oscillation lies in promotion of the oscillatory periodicity. By placing an asymmetric obstacle at an appropriate position near a channel opening, we can significantly improve the oscillation quality, which approaches the quality of an ideal oscillation. Additionally, we experimentally explore the relationship between the oscillation quality and various system parameters such as the obstacle position. Based on experimental observations, we incorporate a random noise into our previous model and properly reproduce the experimental results. The agreement between theory and experiment uncovers the mechanism of delicate competition between noise and unidirectional particle flow in influencing the oscillation quality. Our findings provide new insights for the optimization of the oscillation quality, expand the conventional rectification capability of the ratchet effect due to the obstacle, and make it possible for spontaneous oscillation to serve as a reliable source for rhythmic signals.

ISSN号：1744-683X

卷、期、页：网络发表

影响因子：0.000000

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：SOFT MATTER

参与作者：张雪,田宇鑫,倪冉,朱勇,刘鹏,杨明成,郑宁

第一作者：宁鲁慧

论文类型：期刊论文

论文概要：张雪,田宇鑫,倪冉,朱勇,宁鲁慧,刘鹏,杨明成,郑宁，Obstacle-enhanced spontaneous oscillation of confined active granules，SOFT MATTER，，网络发表

论文题目：Obstacle-enhanced spontaneous oscillation of confined active granules