arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1201.0180cond-mat.softnlin.AOphysics.comp-ph
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自推进粒子的热群和非热群

Thermal and Athermal Swarms of Self-Propelled Particles

Nguyen HP Nguyen, Eric Jankowski, Sharon C. Glotzer

摘要:

自推进粒子群表现出复杂的行为,可以从简单的模型中产生,模型参数的微小变化会导致群行为的巨大变化。我们研究了稳态群体形成的自推进莫尔斯粒子在三维使用分子动力学模拟优化GPU。我们发现各种不同的整体形状的群组装自发地和某些莫尔斯潜在的参数共存的结构进行观察。我们报告了一个丰富的“相图”的非热群结构观察到在广泛的相互作用参数。与平衡自组装中形成的结构不同,我们发现形成自推进群的概率可以通过初始条件的选择来偏置。我们研究热噪声如何影响群的形成,并展示了它可以被利用来重新配置一个群到另一个。我们的研究结果验证和扩展以前的观察自推进莫尔斯集群和突出开放的问题,预测理论的非平衡自组装。

英文摘要:

Swarms of self-propelled particles exhibit complex behavior that can arise from simple models, with large changes in swarm behavior resulting from small changes in model parameters. We investigate the steady-state swarms formed by self-propelled Morse particles in three dimensions using molecular dynamics simulations optimized for GPUs. We find a variety of swarms of different overall shape assemble spontaneously and that for certain Morse potential parameters coexisting structures are observed. We report a rich "phase diagram" of athermal swarm structures observed across a broad range of interaction parameters. Unlike the structures formed in equilibrium self-assembly, we find that the probability of forming a self-propelled swarm can be biased by the choice of initial conditions. We investigate how thermal noise influences swarm formation and demonstrate ways it can be exploited to reconfigure one swarm into another. Our findings validate and extend previous observations of self-propelled Morse swarms and highlight open questions for predictive theories of nonequilibrium self-assembly.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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