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arXiv 0811.0464cond-mat.dis-nncond-mat.stat-mech
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自旋玻璃在规则晶格上的多临界点位置

Locations of multicritical points for spin glasses on regular lattices

Masayuki Ohzeki

摘要:

我们提出了一个分析,导致精确的位置的多临界点的自旋玻璃上定期晶格。用于确定多临界点的位置的传统技术是以前使用从对偶性和复制品方法中出现的假设而得出的。在本研究中,我们提出了一个系统的技术,通过一个改进的技术,给出更精确的位置的多临界点的正方形,三角形和六边形晶格仔细检查之间的关系,两个配分函数相互关联的对偶。发现$\pm J$伊辛模型的多临界点在正方格子上位于$p_c = 0.890813$,其中$p_c$表示$J_{ij} = J(>0)$的概率,在三角格子上位于$p_c = 0.835985$,在六角格子上位于$p_c = 0.932593$.这些结果与最近的数值估计非常吻合。

英文摘要:

We present an analysis leading to precise locations of the multicritical points for spin glasses on regular lattices. The conventional technique for determination of the location of the multicritical point was previously derived using a hypothesis emerging from duality and the replica method. In the present study, we propose a systematic technique, by an improved technique, giving more precise locations of the multicritical points on the square, triangular, and hexagonal lattices by carefully examining relationship between two partition functions related with each other by the duality. We can find that the multicritical points of the $\pm J$ Ising model are located at $p_c = 0.890813$ on the square lattice, where $p_c$ means the probability of $J_{ij} = J(>0)$, at $p_c = 0.835985$ on the triangular lattice, and at $p_c = 0.932593$ on the hexagonal lattice. These results are in excellent agreement with recent numerical estimations.

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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