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arXiv 1603.06014cond-mat.stat-mechcond-mat.soft
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可逆和不可逆生长过程轨迹系综的相似性

Similarity of ensembles of trajectories of reversible and irreversible growth processes

Katherine Klymko, Juan P. Garrahan, Stephen Whitelam

摘要:

细菌生长的模型往往是“不可逆的”,允许菌落中的细菌数量增加,但不会减少。相比之下,分子自组装的模型通常是“可逆的”,允许在结构中添加和移除粒子。这类过程有一个根本的区别,因为只有可逆过程才具有平衡态。在这里,我们表明,在平均场水平上,可逆和不可逆的增长过程的动态轨迹是相似的,都感觉到吸引子的影响,在该增长的收益没有限制,但系统的强度属性是不变的。这两个过程的吸引子进行非平衡相变模型参数的变化,提出了一个统一的方式来描述可逆和不可逆的增长。我们还建立了一个不可逆的增长模型(磁伊甸园模型)和平衡伊辛模型之间的平均场水平的连接,支持其他作者使用数值模拟的结果。

英文摘要:

Models of bacterial growth tend to be `irreversible', allowing for the number of bacteria in a colony to increase but not to decrease. By contrast, models of molecular self-assembly are usually `reversible', allowing for addition and removal of particles to a structure. Such processes differ in a fundamental way because only reversible processes possess an equilibrium. Here we show at mean-field level that dynamic trajectories of reversible and irreversible growth processes are similar in that both feel the influence of attractors, at which growth proceeds without limit but the intensive properties of the system are invariant. Attractors of both processes undergo nonequilibrium phase transitions as model parameters are varied, suggesting a unified way of describing reversible and irreversible growth. We also establish a connection at mean-field level between an irreversible model of growth (the magnetic Eden model) and the equilibrium Ising model, supporting the findings made by other authors using numerical simulations.

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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