Physics of Living Systems, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
J Chem Phys. 2018 Oct 28;149(16):164911. doi: 10.1063/1.5045686.
We study theoretically the physical properties of Rouse polymers when a subset of monomers along the backbone is subjected to an additional driving force of exponentially correlated fluctuating noise. In other words, the polymers are made up of two kinds of particle, one of which has an additional coupling to an active bath that subjects those particles to extra forces. We analyze properties of these active polymers, such as the end to end distance and the local structure induced by active kicks. We then proceed to quantify how the dynamics of such polymers depend on the proportion of monomers which are being actively driven, and show how the dynamics transitions from the normal Rouse like behavior to substantially faster dynamics. Finally we analyze some of the non-equilibrium properties induced in these systems, such as the irreversibility.
我们从理论上研究了当链上的一部分单体受到指数相关的随机噪声的额外驱动力时，Rouse 聚合物的物理性质。换句话说，这些聚合物由两种粒子组成，其中一种与主动浴有额外的耦合，使这些粒子受到额外的力。我们分析了这些活性聚合物的性质，如末端到末端的距离和由活性踢引起的局部结构。然后，我们继续定量分析这些聚合物的动力学如何取决于被主动驱动的单体的比例，并展示了动力学如何从正常的 Rouse 行为转变为更快的动力学。最后，我们分析了这些系统中产生的一些非平衡性质，如不可逆性。
