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arXiv 1104.3048cond-mat.stat-mechmath-phmath.MP
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拓扑玻璃中相关性的衰减

Decay of Correlations in a Topological Glass

Jean-Pierre Eckmann, Maher Younan

摘要:

在本文中,我们继续研究拓扑玻璃系统。该模型的状态空间由具有$N$节点的球体的所有三角剖分给出,其中一半为红色,一半为蓝色。红色节点希望有5个邻居,而蓝色节点希望有7个邻居。具有其他数量邻居的节点的能量应该是正的。动力学是翻转两个相邻三角形之间的对角线,具有依赖于温度的概率。我们考虑在非常低的温度下的系统。我们专注于这个模型的几个新的方面:从一个详细的描述的静止状态,我们得出结论,对缺陷(节点与“错误”的程度)移动非常高的流动性沿1维路径。当它们四处游荡时,它们遇到单个缺陷,然后它们以几何定义的概率“侧向”移动。这引起单个缺陷的扩散运动。如果它们相遇,就会湮灭,降低系统的能量。我们都估计能量衰减到平衡态,以及相关性。特别地,我们发现了像$t^{-0.4}$这样的衰变。

英文摘要:

In this paper we continue the study of a topological glassy system. The state space of the model is given by all triangulations of a sphere with $N$ nodes, half of which are red and half are blue. Red nodes want to have 5 neighbors while blue ones want 7. Energies of nodes with other numbers of neighbors are supposed to be positive. The dynamics is that of flipping the diagonal between two adjacent triangles, with a temperature dependent probability. We consider the system at very low temperatures. We concentrate on several new aspects of this model: Starting from a detailed description of the stationary state, we conclude that pairs of defects (nodes with the "wrong" degree) move with very high mobility along 1-dimensional paths. As they wander around, they encounter single defects, which they then move "sideways" with a geometrically defined probability. This induces a diffusive motion of the single defects. If they meet, they annihilate, lowering the energy of the system. We both estimate the decay of energy to equilibrium, as well as the correlations. In particular, we find a decay like $t^{-0.4}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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