arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2511.20163cond-mat.stat-mechcond-mat.dis-nnhep-th
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关于自旋玻璃相变的本质

On the nature of the spin glass transition

SISSA(的里雅斯特国际高等研究学校);INFN sezione di Trieste(意大利国家核物理研究所的里雅斯特分部)

Gesualdo Delfino

AI总结:

该研究通过重整化群方法揭示二维Ising自旋玻璃的相变本质,指出其连续对称性增强解释了二维无有限温自旋玻璃相变,而高维情况下对称性自发破缺产生连续有序参数。

摘要:

我们最近证明二维Ising自旋玻璃允许一条重整化群固定点,解释了数值研究中观察到的性质。我们观察到这一精确结果对应于增强到一个生成元的连续内对称性。这最终解释了为什么在二维中没有观测到有限温度自旋玻璃相变。在超过二维的情况下,连续对称性可以自发破缺,并产生一个自旋玻璃序参量,对于固定的温度和紊乱强度,其在区间内取连续值。这种特征与已知的具有无限范围相互作用模型的平均场解的序参量相同,该解对应于无限多维。

英文摘要:

We recently showed that the two-dimensional Ising spin glass allows for a line of renormalization group fixed points which explains properties observed in numerical studies. We observe that this exact result corresponds to enhancement to a one-generator continuous internal symmetry. This finally explains why no finite temperature transition to a spin glass phase is observed in two dimensions. In more than two dimensions, instead, the continuous symmetry can be broken spontaneously and yields a spin glass order parameter which, for fixed temperature and disorder strength, takes continuous values in an interval. Such a feature is shared by the order parameter of the known mean field solution of the model with infinite-range interactions, which corresponds to infinitely many dimensions.

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