arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2409.08693cond-mat.dis-nn
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Boolean SK 模型

Boolean SK Model

Linda Albanese, Andrea Alessandrelli

AI总结:

该研究针对Boolean自旋替代Ising自旋的研究空白,提出Boolean SK模型,通过Guerra插值法推导相关理论表达式并经数值验证,发现其无低温相变、呈连续玻璃态转变的关键特性。

摘要:

半个多世纪以来,自旋玻璃的统计力学一直是建模和解释从数量生物学到计算机科学等各类现象的范式。然而,尽管该领域已有大量研究,但针对用Boolean自旋替代Ising自旋的研究仍明显匮乏:由于后者在机器学习中充当比特位,填补这一空白如今已势在必行。本文旨在通过聚焦平均场假设开展这项研究,全面阐述这类网络的相关结果——因其与SK模型关系密切,故被称为Boolean SK模型。我们采用Guerra插值法为该模型构建了完整框架,推导了热力学极限、复制对称及复制对称破缺下的自由能表达式。此外,我们考察了复制对称破缺的起始点(即de Almeida-Thouless线),并推导了Ghirlanda-Guerra涨落。所有理论发现均得到了数值验证,二者共同凸显了该网络与Ising SK模型相比的关键行为差异:随着温度降低,未观测到相变,模型会从随机(遍历)行为连续过渡到无序(玻璃态)相。

英文摘要:

For over half a century, statistical mechanics of spin glasses played as a paradigm to model and interpret disparate phenomena, ranging from quantitative biology to computer science. However, despite the extensive body of research in this area, there is still a notable lack of studies addressing the replacement of Ising spins with Boolean spins: as the latter play as bits in Machine Learning, this gap to fill is now mandatory. Purpose of this paper is to address this study by focusing on the mean field assumption, providing a comprehensive description of the results pertaining to these networks, referred to as the Boolean SK model due to their close relationship with the SK one. We provide a comprehensive framework for this model by employing Guerra interpolation: the thermodynamic limit, the replica symmetric and the broken replica free energy expressions are derived. Further, we inspect the onset of the replica symmetry breaking -- i.e., the de Almeida-Thouless line -- and derive Ghirlanda-Guerra fluctuations. All theoretical findings are corroborated by numerical inspections and both highlight crucial differences in the network's behavior if compared with the Ising SK model: as the temperature is lowered, no phase transitions are evidenced and the model continuously moves from a random (ergodic) behavior to a disordered (glassy) phase.

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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