The Rudolf Peierls Centre for Theoretical Physics, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
J Chem Phys. 2019 Feb 14;150(6):064909. doi: 10.1063/1.5085282.
We numerically study the dynamics of two-dimensional blue phases in active chiral liquid crystals. We show that introducing contractile activity results in stabilised blue phases, while small extensile activity generates ordered but dynamic blue phases characterised by coherently moving half-skyrmions and disclinations. Increasing extensile activity above a threshold leads to the dissociation of the half-skyrmions and active turbulence. We further analyse isolated active half-skyrmions in an isotropic background and compare the activity-induced velocity fields in simulations to an analytical prediction of the flow. Finally, we show that confining an active blue phase can give rise to a system-wide circulation, in which half-skyrmions and disclinations rotate together.
我们通过数值研究了各向同性背景下活性蓝相中单一半斯米子的动力学行为，并将模拟得到的活性诱导速度场与解析预测的流场进行了比较。最后，我们表明，限制活性蓝相可以产生一个整体的循环系统，其中半斯米子和不连续性一起旋转。
