Dimensional crossover in the nearest-neighbor statistics of random points in a quasi-low-dimensional system

Abstract

In this work, we study the effects of geometric confinement on the point statistics in a quasi-low-dimensional system. Specifically, we focus on the nearest-neighbor statistics. Accordingly, we have performed comprehensive numerical simulations of binomial point process on quasi-one-dimensional rectangle strips for different values of the confinement ratio defined as the ratio of the strip width to the mean nearest-neighbor distance. We found that the nearest-neighbor distance distributions (NNDDs) conform to an extreme value Weibull distribution with the shape parameter depending on the confinement ratio, while the process intensity remains constant. This finding reveals the reduction of effective spatial degrees of freedom in a quasi-low-dimensional system under the geometric confinement. The scale dependence of the number of effective spatial degrees of freedom is found to obey the crossover ansatz. We stress that the functional form of the crossover ansatz is determined by the nature of the studied point process. Accordingly, different physical processes in the quasi-low-dimensional system obey different crossover ansatzes. The relevance of these results for quasi-low-dimensional systems is briefly highlighted.

Non-standard analysis for fractal calculus

“…Comprehensive numerical simulations were carried out using binomial point processes on quasi-onedimensional rectangle strips, considering various confinement ratio values. The findings revealed that the distributions of nearest-neighbor distances followed an extreme value Weibull distribution, where the shape parameter was contingent on the confinement ratio [32]. The fractal characteristics impact formation factors in pore-fracture networks for different transport processes.…”

Origin of regularity in different nuclei from the viewpoint of the effective quadrupole deformation and triaxiality

“…For this purpose, we first unfold the data related to each level. The method used to unfold the data for the statistical study of energy levels is the nearest neighbor spacing distribution (NNSD) [62][63][64][65]. However, regarding β eff , the issue of the distance between the data is not discussed.…”