论文标题
两个物种驱动扩散晶格气体的垂直和平行相分离
Perpendicular and Parallel Phase Separation in Two Species Driven Diffusive Lattice Gases
论文作者
论文摘要
我们研究了三种不同的晶格模型，其中两种散射颗粒由电场驱动相反的方向。我们专注于涉及相位分离到可能平行或垂直于驱动场的域的动态相变。在所有情况下，垂直状态似乎都与以前的工作一致。对于强驾驶，我们引入了两个支持平行状态的模型。在一个模型中，这种状态之所以出现，是因为包含动态规则，这些规则可以增强碰撞过程中的横向扩散。另一方面，这是同一/相反物种颗粒之间最近邻居的吸引人/排斥相互作用的结果。我们讨论了这些结果与武器外系统中发现的行为之间的连接，包括通过加热和冻结。
We study three different lattice models in which two species of diffusing particles are driven in opposite directions by an electric field. We focus on dynamical phase transitions that involve phase separation into domains that may be parallel or perpendicular to a driving field. In all cases, the perpendicular state appears for weak driving, consistent with previous work. For strong driving, we introduce two models that support the parallel state. In one model, this state occurs because of the inclusion of dynamical rules that enhance lateral diffusion during collisions; in the other, it is a result of a nearest-neighbour attractive/repulsive interaction between particles of the same/opposite species. We discuss the connections between these results and the behaviour found in off-lattice systems, including laning and freezing by heating.
