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arXiv 0802.2760cond-mat.dis-nncond-mat.stat-mech
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等级格点上自旋玻璃模型的多临界点

Multicritical points for the spin glass models on hierarchical lattices

Masayuki Ohzeki, Hidetoshi Nishimori, A. Nihat Berker

摘要:

用重整化群分析方法数值研究了多个等级格点上多临界点的位置。所得结果与利用对偶性、规范对称性和复制方法导出的解析猜想进行了比较。我们发现,该猜想并没有给出确切的答案,但导致的位置稍微远离数值可靠的数据。我们提出了一个改进的猜想,给出更精确的预测的多临界点比传统的。这一改进是受重整化群的新观点的启发,并成功地得到了与许多数值数据非常一致的结果。

英文摘要:

The locations of multicritical points on many hierarchical lattices are numerically investigated by the renormalization group analysis. The results are compared with an analytical conjecture derived by using the duality, the gauge symmetry and the replica method. We find that the conjecture does not give the exact answer but leads to locations slightly away from the numerically reliable data. We propose an improved conjecture to give more precise predictions of the multicritical points than the conventional one. This improvement is inspired by a new point of view coming from renormalization group and succeeds in deriving very consistent answers with many numerical data.

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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