Entropy Scaling Laws in Self Propelled Glass Formers

Here we probe a glass forming liquid composed of self- propelled “active” particles and show that increasing the duration of self-propulsion makes the pair excess entropy negatively larger. The associated reduction in the number of accessible configurations per particle leads to a reduction in self- diffusivity. At moderate supercooling, the self-diffusivity is Arrhenius and in a reduced form obeys a Dzugutov like scaling law, directly yielding us a pair excess entropy that is inversely proportional to the effective temperature. In the strongly super-cooled regime, Dzugutov law does not apply and we observe that, the pair excess entropy shows a non-Arrhenius (power law) dependence on the effective temperature with an exponent that depends on the self propulsion time of the active particles.本研究针对由自驱动‘活性’粒子（self-propelled active particles）构成的玻璃形成液体（glass forming liquid）展开探究，结果表明，延长自驱动时长会使配对过剩熵（pair excess entropy）的负值进一步增大。与之相伴的单粒子可及构型数减少，会导致自扩散系数（self-diffusivity）降低。在中等过冷条件下，自扩散系数呈现阿伦尼乌斯（Arrhenius）行为，其约化形式符合祖古托夫类标度律（Dzugutov-like scaling law），由此可直接推导出配对过剩熵与有效温度（effective temperature）呈反比关系。在强过冷区域（strongly super-cooled regime）中，祖古托夫定律不再适用，我们观测到配对过剩熵与有效温度呈非阿伦尼乌斯（幂律（power law））依赖关系，其指数取决于活性粒子的自驱动时长。