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arXiv 2306.04591cond-mat.dis-nn
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自旋玻璃中的多重分形性

Multifractality in spin glasses

Janus Collaboration, M. Baity-Jesi, E. Calore, A. Cruz, L. A. Fernandez, J. M. Gil-Narvion, I. Gonzalez-Adalid Pemartin, A. Gordillo-Guerrero, D. Iñiguez, A. Ma… 展开作者

Janus Collaboration, M. Baity-Jesi, E. Calore, A. Cruz, L. A. Fernandez, J. M. Gil-Narvion, I. Gonzalez-Adalid Pemartin, A. Gordillo-Guerrero, D. Iñiguez, A. Maiorano, E. Marinari, V. Martin-Mayor, J. Moreno-Gordo, A. Muñoz Sudupe, D. Navarro, I. Paga, G. Parisi, S. Perez-Gaviro, F. Ricci-Tersenghi, J. J. Ruiz-Lorenzo, S. F. Schifano, B. Seoane, A. Tarancon, D. Yllanes

AI总结:

研究借助 Janus II 超级计算机局部分析 Ising 自旋玻璃低温相关函数,通过奇异谱与 Legendre 变换揭示其多重分形涨落,并调和了小尺度非自平均与宏观平滑动力学。

摘要:

我们揭示了 Ising 自旋玻璃在低温相中的多重分形行为。利用 Janus II 定制超级计算机,对自旋玻璃关联函数进行了局部研究。在比较相同距离的位点对时,发现了剧烈的涨落。随着自旋玻璃相干长度随时间增长,这些涨落的标度通过计算奇异谱及其相应的 Legendre 变换得到表征。相对较少数量的位点对控制着决定磁场响应的平均关联。我们解释了这种剧烈涨落的情形(在小于相干长度的尺度上)如何能够与长期以来被认为描述自旋玻璃动力学的平滑、自平均行为相协调。

英文摘要:

We unveil the multifractal behavior of Ising spin glasses in their low-temperature phase. Using the Janus II custom-built supercomputer, the spin-glass correlation function is studied locally. Dramatic fluctuations are found when pairs of sites at the same distance are compared. The scaling of these fluctuations, as the spin-glass coherence length grows with time, is characterized through the computation of the singularity spectrum and its corresponding Legendre transform. A comparatively small number of site pairs controls the average correlation that governs the response to a magnetic field. We explain how this scenario of dramatic fluctuations (at length scales smaller than the coherence length) can be reconciled with the smooth, self-averaging behavior that has long been considered to describe spin-glass dynamics.

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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