通往普遍性的非普遍途径：胶体分散体中的临界现象
Nonuniversal routes to universality: Critical phenomena in colloidal dispersions
摘要：
我们研究临界现象的胶体通过重整化群为基础的分层参考理论的流体（HRT）。我们专注于三个实验相关的模型系统：即，Asakura-Oosawa模型的聚合物诱导的吸引力耗尽力的影响下的胶体分散体;流体与竞争的短程吸引力和长程排斥力的相互作用;解决方案的星型聚合物，其对潜在的同时提出了一个有吸引力的井和超软排斥在较短的距离。我们的研究结果表明，调整胶体粒子之间的有效相互作用的能力，使之能够产生各种交叉的渐近临界行为，这是没有观察到的原子流体。
英文摘要：
We investigate critical phenomena in colloids by means of the renormalization-group based hierarchical reference theory of fluids (HRT). We focus on three experimentally relevant model systems: namely, the Asakura-Oosawa model of a colloidal dispersion under the influence of polymer-induced attractive depletion forces; fluids with competing short-range attractive and longer-range repulsive interactions; solutions of star-polymers whose pair potential presents both an attractive well and an ultrasoft repulsion at shorter distance. Our results show that the ability to tune the effective interactions between colloidal particles allows one to generate a variety of crossovers to the asymptotic critical behavior, which are not observed in atomic fluids.
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