论文标题
双向运输的合作动力学在柔性晶格上
Cooperative dynamics in bidirectional transport on flexible lattice
论文作者
论文摘要
基于完全不对称的简单排除过程（TASEP）的几种理论模型已广泛用于研究各种非平衡运输现象。受微管传输囊泡在细胞内转运中的作用的启发，我们提出了一个广义的Tasep模型，其中两个不同的颗粒被指示在浸入三维扩散颗粒的三维池中的柔性晶格上随机跳动。我们通过在平均场理论框架内获得固定相图和密度曲线来研究晶格构象和双向转运之间的相互作用。对于回收强度与颗粒密度无关的情况，相图的拓扑会在定量上改变。但是，如果晶格的占用率控制着晶格的全球构象，除了双向转运的先前阶段，系统中的新型不对称冲击密度阶段还起源于系统。我们确定此阶段对有限尺寸效应敏感，并且在热力学极限下消失。
Several theoretical models based on totally asymmetric simple exclusion process (TASEP) have been extensively utilized to study various non-equilibrium transport phenomena. Inspired by the the role of microtubule-transported vesicles in intracellular transport, we propose a generalized TASEP model where two distinct particles are directed to hop stochastically in opposite directions on a flexible lattice immersed in a three dimensional pool of diffusing particles. We investigate the interplay between lattice conformation and bidirectional transport by obtaining the stationary phase diagrams and density profiles within the framework of mean field theory. For the case when recycling strength is independent of density of particles, the topology of phase diagram alters quantitatively. However, if the lattice occupancy governs the global conformation of lattice, in addition to the pre-existing phases for bidirectional transport a new asymmetric shock-low density phase originates in the system. We identified that this phase is sensitive to finite size effect and vanishes in the thermodynamic limit.
