Quotient maps and configuration spaces of hard disks
Quotient maps and configuration spaces of hard disks
复制标题
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.
中科院分区:
文献类型:
--
作者:
Ericok, Ozan B.;Mason, Jeremy K.
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
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