AI 中文总结
该研究用分子动力学模拟强耦合尘埃等离子体晶体引力沉降，通过研究单层、双层和三层晶体，发现多层晶体碰撞边界时会反弹，连续循环中虽结构演变但能维持集体运动，为相关沉降研究提供解析描述和理论框架。
AI 中文摘要
利用分子动力学模拟研究了强耦合尘埃等离子体晶体的引力沉降。尘埃粒子最初由向上的外部电场和重力平衡悬浮，去除电场后开始沉降，粒子在重力作用下集体沉降并通过 Yukawa（屏蔽库仑）势相互作用。研究了单层、AB 堆叠双层和 ABA 堆叠三层晶体，多层晶体碰撞边界时会经历层间压缩和动量传递产生反弹，连续循环中结构逐渐演变但仍能维持集体机械响应。结果表明强 Yukawa 耦合使多层尘埃等离子体晶体能承受反复冲击并保持集体运动。本研究为多层尘埃等离子体晶体引力沉降提供了粒子解析描述，并为解释去除静电约束后的实验室实验提供了理论框架。
英文摘要
The gravitational sedimentation of strongly coupled dusty plasma crystals is investigated using molecular dynamics simulations. Initially, the dust particles are levitated by the balance between the upward external electric field and gravity. Sedimentation is initiated by removing the electric field, allowing the particles to settle collectively under gravity while interacting through the Yukawa (screened Coulomb) potential. Single-layer, AB-stacked bilayer, and ABA-stacked trilayer crystals are investigated to examine the influence of crystal geometry on the sedimentation dynamics. All crystal configurations undergo collective gravitational settling while preserving their in-plane hexagonal ordering during the initial stages of sedimentation. Upon collision with a reflecting boundary, the multilayer crystals undergo transient interlayer compression followed by sequential momentum transfer between neighboring layers, producing coherent collective rebound. In particular, the trilayer exhibits sequential layer-by-layer momentum propagation from the lower to the middle and finally to the upper layer. During successive sedimentation--rebound cycles, repeated interlayer interactions progressively degrade the initial ABA stacking while preserving the collective mechanical response of the crystal. These results demonstrate that strong Yukawa coupling enables multilayer dusty plasma crystals to sustain repeated impacts while maintaining coherent collective motion despite gradual structural evolution. The present study provides a particle-resolved description of gravitational sedimentation in multilayer dusty plasma crystals and offers a theoretical framework for interpreting laboratory experiments following the removal of electrostatic confinement.
