Quotient maps and configuration spaces of hard disks

Quotient maps and configuration spaces of hard disks
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硬盘的商图和配置空间

DOI:
10.1007/s10035-022-01235-5
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发表时间:
2022
期刊:
影响因子:
2.4
通讯作者:
Mason, Jeremy K.
Mason, Jeremy K.
中科院分区:
工程技术3区
文献类型:
--
作者:
Ericok, Ozan B.;Mason, Jeremy K.

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硬盘系统通常被认为是简单流体的原型。在统计力学的背景下,硬盘配置空间通常由各种对称群的作用所限制。在拓扑和几何性质的变化所影响的配置空间的商映射研究了少量的磁盘上的正方形和六边形环面。度量定义的配置空间和各种商空间,尊重所需的对称性。这是用来构建明确的三角形的配置空间作为复合物。硬盘势能在组态空间上的临界点与组态空间可达部分的拓扑结构随硬盘半径的变化有关,并被证明与玻璃态系统的组态熵有关,还可以揭示其它系统相变的起源.临界点的数目及其拓扑和几何性质取决于位形空间的对称性。图形摘要
Hard disks systems are often considered as prototypes for simple fluids. In a statistical mechanics context, the hard disk configuration space is generally quotiented by the action of various symmetry groups. The changes in the topological and geometric properties of the configuration spaces effected by such quotient maps are studied for small numbers of disks on a square and hexagonal torus. A metric is defined on the configuration space and the various quotient spaces that respects the desired symmetries. This is used to construct explicit triangulations of the configuration spaces as-complexes. Critical points of the hard disk potential on a configuration space are associated with changes in the topology of the accessible part of the configuration space as a function of disk radius, are conjectured to be related to the configurational entropy of glassy systems, and could reveal the origins of phase transitions in other systems. The number of critical points and their topological and geometric properties are found to depend on the symmetries by which the configuration space is quotiented.Graphic abstract
DOI: --
发表时间: 2019
期刊:
影响因子: --
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