arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1001.4873cond-mat.dis-nncond-mat.stat-mech
收藏

Bethe格上$\pm J$模型配分函数零点的分布

Distribution of partition function zeros of the $\pm J$ model on the Bethe lattice

Yoshiki Matsuda, Markus Mueller, Hidetoshi Nishimori, Tomoyuki Obuchi, Antonello Scardicchio

摘要:

研究了自旋玻璃$\pm J$模型在Bethe晶格上的配分函数零点分布。我们发现了复腔场分布与零点密度之间的关系,这使得我们能够利用腔方法得到无限大系统的零点密度。由此从零点位置导出的相位边界与直接解析计算的结果一致。这是第一个自旋玻璃转变直接与晶格极限中的零点分布有关的例子。我们阐明了自旋玻璃化转变的特点是由配分函数的零点。在自旋玻璃相中,连续分布的奇点与实场和温度轴相交。

英文摘要:

The distribution of partition function zeros is studied for the $\pm J$ model of spin glasses on the Bethe lattice. We find a relation between the distribution of complex cavity fields and the density of zeros, which enables us to obtain the density of zeros for the infinite system size by using the cavity method. The phase boundaries thus derived from the location of the zeros are consistent with the results of direct analytical calculations. This is the first example in which the spin glass transition is related to the distribution of zeros directly in the thermodynamical limit. We clarify how the spin glass transition is characterized by the zeros of the partition function. It is also shown that in the spin glass phase a continuous distribution of singularities touches the axes of real field and temperature.

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。

↑