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arXiv 2010.08387cond-mat.stat-mech
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能动性诱导相分离的活性晶格模型中的临界行为

Critical behaviour in active lattice models of motility-induced phase separation

Florian Dittrich, Thomas Speck, Peter Virnau

摘要:

与非晶格系统相比,晶格模型允许对运动诱导的相分离(MIPS)进行计算有效的调查。模拟的要求较低,因此可以以更高的准确性和更好的统计数据访问更大的系统。在平衡态下,具有可比相互作用的格点模型和非格点模型属于同一普适类。普适性的概念是否也适用于活性粒子,仍然是一个有争议和开放的问题。在这里,我们研究了两个最近提出的积极的晶格系统,进行MIPS和数字调查他们的临界行为。特别是,我们研究的索赔,这些系统和MIPS一般属于伊辛普适性类。我们还采取了更详细的看看在这些系统中的旋转扩散和积极的速度的影响和作用。

英文摘要:

Lattice models allow for a computationally efficient investigation of motility-induced phase separation (MIPS) compared to off-lattice systems. Simulations are less demanding and thus bigger systems can be accessed with higher accuracy and better statistics. In equilibrium, lattice and off-lattice models with comparable interactions belong to the same universality class. Whether concepts of universality also hold for active particles is still a controversial and open question. Here, we examine two recently proposed active lattice systems that undergo MIPS and investigate numerically their critical behaviour. In particular, we examine the claim that these systems and MIPS in general belong to the Ising universality class. We also take a more detailed look on the influence and role of rotational diffusion and active velocity in these systems.

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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