Asymptotic energy of lattices

Asymptotic energy of lattices
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晶格的渐近能量

DOI:
10.1016/j.physa.2008.12.058
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发表时间:
2008-10
影响因子:
3.3
通讯作者:
Yan, Weigen
Yan, Weigen
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhang, Zuhe;Yan, Weigen

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在化学物理中,一个简单图生的能量,记为,定义为特征值的绝对值之和。我们考虑格点系统的每一顶点的渐近能量(称渐近能量)。对于统计物理中的一类格子,在环面、柱面、能带、Klein-bottle和自由边界条件下计算渐近能量是不同难度的不同任务。本文证明了如果是平均度有界的有限简单图序列和的生成子图序列,使得和的几乎所有顶点都具有相同的度,则和具有相同的渐近能量。因此,对于每一种具有环形、圆柱形、带形、克莱因瓶形和自由边界条件的晶格,我们都有相同的渐近能量。作为应用,我们同时得到了三角形、、和六角晶格在环面、柱面、环带、Klein-bottle和自由边界条件下的顶点能量的渐近公式。
The energy of a simple grapharising in chemical physics, denoted by, is defined as the sum of the absolute values of eigenvalues of. We consider the asymptotic energy per vertex (say asymptotic energy) for lattice systems. In general for a type of lattice in statistical physics, to compute the asymptotic energy with toroidal, cylindrical, Mobius-band, Klein-bottle, and free boundary conditions are different tasks with different hardness. In this paper, we show that ifis a sequence of finite simple graphs with bounded average degree anda sequence of spanning subgraphs ofsuch that almost all vertices ofandhave the same degrees, thenandhave the same asymptotic energy. Thus, for each type of lattices with toroidal, cylindrical, Mobius-band, Klein-bottle, and free boundary conditions, we have the same asymptotic energy. As applications, we obtain the asymptotic formulae of energies per vertex of the triangular,, and hexagonal lattices with toroidal, cylindrical, Mobius-band, Klein-bottle, and free boundary conditions simultaneously.
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