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arXiv 1810.03215math.PRmath-phmath.MP
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多种类Sherrington-Kirkpatrick模型中的副本对称性破缺

Replica symmetry breaking in multi-species Sherrington-Kirkpatrick model

Erik Bates, Leila Sloman, Youngtak Sohn

AI总结:

本文针对多种类Sherrington-Kirkpatrick模型,在两种类正定方差结构下导出了显式的AT温度阈值,首次给出多种类自旋玻璃的非渐近对称性破缺条件,并证明其与副本对称临界点唯一性条件相吻合。

摘要:

在Sherrington-Kirkpatrick(SK)及相关混合p-自旋模型中,理解低温下的副本对称性破缺一直备受关注。为此,de Almeida和Thouless提出的所谓AT线作为对称性破缺的充分(且被推测为必要)条件,一直是自旋玻璃理论中频繁研究的对象。本文考虑多种类SK模型中的类似条件,该条件涉及Hessian矩阵的特征向量。在具有正定方差结构的两种类情形下,该分析是可处理的,我们由此导出了一个显式的AT温度阈值。据我们所知,这是首次为多种类自旋玻璃给出的非渐近对称性破缺条件。作为该条件可能是精确的可能的证据,我们进一步与经典SK模型进行类比,并证明该条件与一个保证副本对称临界点唯一性的独立温度不等式相吻合。

英文摘要:

In the Sherrington-Kirkpatrick (SK) and related mixed $p$-spin models, there is interest in understanding replica symmetry breaking at low temperatures. For this reason, the so-called AT line proposed by de Almeida and Thouless as a sufficient (and conjecturally necessary) condition for symmetry breaking, has been a frequent object of study in spin glass theory. In this paper, we consider the analogous condition for the multi-species SK model, which concerns the eigenvectors of a Hessian matrix. The analysis is tractable in the two-species case with positive definite variance structure, for which we derive an explicit AT temperature threshold. To our knowledge, this is the first non-asymptotic symmetry breaking condition produced for a multi-species spin glass. As possible evidence that the condition is sharp, we draw further parallel with the classical SK model and show coincidence with a separate temperature inequality guaranteeing uniqueness of the replica symmetric critical point.

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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