论文标题
二维性手流体的扩散度
Diffusive regimes in a two-dimensional chiral fluid
论文作者
论文摘要
扩散是生物系统运输过程的基本方面，因此是生命本身的发展。然而，到目前为止，尚未详细分析具有定向旋转（称为手性流体）的活性流体的扩散动力学。在这里，我们描述了二维手性流体的扩散状态，在这种情况下是一组相同的磁盘形转子。我们发现了奇数扩散的有力实验证据。这种奇数扩散以二维张量的形式出现，并具有反对称部分。特别是，我们表明手性扩散是复杂的，具有超级，准正常和子扩散之间的过渡，并且衰老非常缓慢。此外，我们表明扩散张量元件，包括偏离分子元件。即，奇数扩散系数，根据流量涡度更改符号。因此，手性液具有自调节的扩散，由其涡度控制。
Diffusion is a fundamental aspect of transport processes in biological systems, and thus, in the development of life itself. And yet, the diffusive dynamics of active fluids with directed rotation, known as chiral fluids, has not been analyzed in detail so far. Here, we describe the diffusive regimes of a two-dimensional chiral fluid, composed in this case of a set of identical disk-shaped rotors. We found strong experimental evidence of odd diffusion. This odd diffusion emerges in the form of a two-dimensional tensor with an antisymmetric part. In particular, we show that chiral diffusion is complex, featuring transitions between super, quasi-normal, and sub diffusion, and very slowly aging. Moreover, we show that the diffusion tensor elements, including off-diagonal elements; i.e., odd diffusion coefficient, change sign according to flow vorticity. Therefore, the chiral fluid has a self regulated diffusion, controlled by its vorticity.
