论文标题
在血浆介质中的二维电荷灰尘粒子簇中的动力状态
Dynamical states in two-dimensional charged dust particle clusters in plasma medium
论文作者
论文摘要
在分子动力学（MD）模拟的帮助下，已经显示了在二维中收集尘埃颗粒的新型动力状态的形成。带电的灰尘颗粒与Yukawa对相互作用，模仿了由于血浆引起的筛选。此外，还将外部径向限制力施加到灰尘颗粒上，以使其径向限制。当粒子数较低（例如几个）时，它们会在对应于多个环/壳的径向位置上排列。对于特定数字，这种颗粒的排列是静止的。但是，在几种情况下，灰尘颗粒簇放松到环上的灰尘颗粒在该状态中显示出壳间旋转。对于大量的灰尘颗粒（例如几百个），可以观察到具有相干刚体的新型平衡状态，显示了整个群集的角度振荡。已经提供了这些状态在粒子数，耦合参数等方面的详细表征。
The formation of novel dynamical states for a collection of dust particles in two dimensions has been shown with the help of Molecular Dynamics (MD) simulation. The charged dust particles interact with each other with Yukawa pair potential mimicking the screening due to plasma. Additionally, an external radial confining force has also been applied to the dust particles to keep them radially confined. When the particle number is low ( say a few), they get arranged on the radial location corresponding to multiple rings/shells. For specific numbers, such an arrangement of particles is stationary. However, for several cases, the cluster of dust particles relaxes to a state for which the dust particles on rings display inter-shell rotation. For a larger number of dust particles ( a few hundred for instance ) a novel equilibrium state with coherent rigid body displaying angular oscillation of the entire cluster is observed. A detailed characterization of the formation of these states in terms of particle number, coupling parameter, etc., has been provided.
