论文标题
逆转碰撞动力学
Reversal Collision Dynamics
论文作者
论文摘要
在研究粘液细菌的逆转行为的推动下,在本文中,我们对逆转动力学的动力学模型感兴趣,在这种动力学上,其方向接近相反的粒子会发生二进制碰撞,从而导致其方向逆转。为此,提出并研究了一种粒子与状态之间的二进制碰撞的通用模型,并提出了表现出特定对称特性的一般度量空间。逆转过程是通过在空间上的互动给出的,碰撞的速率仅被认为是有界和较低的半连续的。我们使用图形理论连通性的概念证明了测量解决方案的存在和独特性及其与平衡的融合。我们首先根据状态空间上图的连接组件来表征平衡的形状,这可以与问题的初始数据相关联。加强在下面收敛速率的子集上连接性的概念,然后我们显示指数融合朝向与初始条件相关的独特稳态。本文以一维圆环的数值模拟结束,为分析结果提供了证据。
Motivated by the study of reversal behaviour of myxobacteria, in this article we are interested in a kinetic model for reversal dynamics, in which particles with directions close to be opposite undergo binary collision resulting in reversing their orientations. To this aim, a generic model for binary collisions between particles with states in a general metric space exhibiting specific symmetry properties is proposed and investigated. The reversal process is given by an involution on the space, and the rate of collision is only supposed to be bounded and lower semi-continuous. We prove existence and uniqueness of measure solutions as well as their convergence to equilibrium, using the graph-theoretical notion of connectivity. We first characterise the shape of equilibria in terms of connected components of a graph on the state space, which can be associated to the initial data of the problem. Strengthening the notion of connectivity on subsets for which the rate of convergence is bounded below, we then show exponential convergence towards the unique steady-state associated to the initial condition. The article is concluded with numerical simulations set on the one-dimensional torus giving evidence to the analytical results.