论文标题
许多非平衡面孔:驱动的周期系统中的异常运输现象
Many faces of nonequilibrium: anomalous transport phenomena in driven periodic systems
论文作者
论文摘要
我们考虑在非平衡条件下运行的通用系统。明确地,我们考虑了一个惯性的经典布朗粒子,居住具有空间损坏的反射对称性的周期性结构。该粒子在温度$ t $下耦合到浴室,并由公正的时间周期力驱动。在渐近长时间的状态下,粒子是布朗运动,表现出有限的定向运输,尽管没有净偏置力在系统上起作用。在这里,我们对本设置的特殊运输行为进行了更多详细的详细介绍和解释。主要重点是将那些不同的新兴布朗扩散异常进行。特别是,在瞬态,时间依赖性结构域中,粒子能够表现出异常的扩散运动,最终仅在渐近长期极限中跨入正常扩散。在后一个限制中,这种正常的扩散系数甚至可能显示出非单调温度依赖性,这意味着它并非随着温度的升高而单调地增加,而是可能表现出一个扩展的,中间的最小值,然后再随着温度的升高而再次生长。
We consider a generic system operating under non-equilibrium conditions. Explicitly, we consider an inertial classical Brownian particle dwelling a periodic structure with a spatially broken reflection symmetry. The particle is coupled to a bath at the temperature $T$ and is driven by an unbiased time-periodic force. In the asymptotic long time regime the particle operates as a Brownian motor exhibiting finite directed transport although no net biasing force acts on the system. Here we review and interpret in further detail recent own research on the peculiar transport behaviour for this setup. The main focus is put on those different emerging Brownian diffusion anomalies. Particularly, within the transient, time-dependent domain the particle is able to exhibit anomalous diffusive motion which eventually crosses over into normal diffusion only in the asymptotic long-time limit. In the latter limit this normal diffusion coefficient may even show a non-monotonic temperature dependence, meaning that it is not monotonically increasing with increasing temperature, but may exhibit instead an extended, intermediate minimum before growing again with increasing temperature.