Cover-time distribution of random processes in granular gases

doi:10.1103/PhysRevE.98.042109

	Cover-time distribution of random processes in granular gases
	Cheng, Ke 1,2; Dong, Jia-Qi 1,2; Huang, Liang 1,2; Yang, Lei3
刊名	PHYSICAL REVIEW E
	2018-10-03
卷号	98
ISSN号	2470-0045
DOI	10.1103/PhysRevE.98.042109
英文摘要	Random processes have attracted much attention due to their broad applications. Despite the many varieties of random processes, it is proposed that there can be universal properties, e.g., the cover-time distributions for noncompact random walks. In this work, we investigate experimentally the cover-time distribution in random processes of granular gases. In particular, the trajectory of a tracer particle in the granular gases is read out by a high-speed camera, which forms a random process that is specific to granular gas systems. Analysis of the covering process of this trajectory is then carried out to get the cover-time distribution. The direct results of cover-time distribution deviates from the universal law, which can be attributed to two main factors: the attracting effect at the boundary and the nonperiodic boundary condition due to the fixed boundaries. By efficiently removing these effects step by step, the cover-time distribution recovers to the universal law approximately, which also reveals that the attracting effect at the boundary is the most dominant factor leading to the discrepancy. We have carried out three distinct experiments with different granular gas circumstances, and all agreed well with the universal distribution after removing the boundary effects.
资助项目	NNSF of China[11422541] ; NNSF of China[11775101]
WOS关键词	ANOMALOUS DIFFUSION ; BROWNIAN-MOTION ; RANDOM-WALKS ; 2 DIMENSIONS ; LATTICE
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000446390500004
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/64377]
专题	中国科学院近代物理研究所
通讯作者	Huang, Liang
作者单位	1.Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Gansu, Peoples R China 2.Lanzhou Univ, Key Lab Magnetism & Magnet Mat MOE, Lanzhou 730000, Gansu, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Ke,Dong, Jia-Qi,Huang, Liang,et al. Cover-time distribution of random processes in granular gases[J]. PHYSICAL REVIEW E,2018,98.
APA	Cheng, Ke,Dong, Jia-Qi,Huang, Liang,&Yang, Lei.(2018).Cover-time distribution of random processes in granular gases.PHYSICAL REVIEW E,98.
MLA	Cheng, Ke,et al."Cover-time distribution of random processes in granular gases".PHYSICAL REVIEW E 98(2018).