Melting transition of vortex lattice in point vortex systems
Melting transition of vortex lattice in point vortex systems
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DOI：
10.1143/jpsj.81.104008
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发表时间：
2012-09
影响因子：
1.7
通讯作者：
H. Sakaguchi;K. Kita
中科院分区：
文献类型：
--
作者：
H. Sakaguchi;K. Kita
点涡旋以旋转系统中的三角晶格结构作为最小能量状态。我们使用初始条件对点涡系统进行数值模拟，表明三角形晶格是随机扰动的。总能量随着扰动的大小而增加。当能量增加时，涡晶格变得不规则并出现层状结构。当能量进一步增加时，层状结构消失，出现液态。我们用层状结构的平均场近似来解释熔化转变。
Point vortices take a triangular lattice structure in a rotating system as a minimum energy state. We perform a numerical simulation of point vortex systems using initial conditions indicating that the triangular lattice is randomly perturbed. The total energy increases with the magnitude of the perturbation. When the energy is increased, the vortex lattice becomes irregular and a layered structure appears. When the energy is further increased, the layered structure disappears and a liquidlike state appears. We interpret the melting transition with a mean-field approximation for layered structures.