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arXiv 2512.03395cond-mat.stat-mechhep-lat
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粒子重整化组计算分区函数比值

Tensor Renormalization Group Calculations of Partition-Function Ratios

Graduate School of Science and Technology, Keio University(庆应义塾大学理工学部);Keio University Sustainable Quantum Artificial Intelligence Center (KSQAIC), Keio University(庆应义塾大学可持续量子人工智能中心);Institute for Solid State Physics, The University of Tokyo(东京大学固体物理研究所);Trans-scale Quantum Science Institute, The University of Tokyo(东京大学跨尺度量子科学研究所)

Satoshi Morita, Naoki Kawashima

AI总结:

本文利用张量重整化组计算了不同通用类别的二维模型的分区函数比值,验证了其与共形场理论预测的一致性,并发现了四态Potts模型中的对数修正。

摘要:

无量纲量的行为分析,这些量定义为分区函数的比值,用于研究相变和临界现象。在临界点,这些比值的通用值可以通过在环面上的模不变分区函数从共形场理论(CFT)预测。我们使用具有键权重的张量重整化组对三个二维模型进行数值计算,这些模型属于不同的通用类别:伊辛模型、三态Potts模型和四态Potts模型。分区函数比值遵循与Binder参数相同的有限尺寸缩放形式,其临界值与CFT预测的通用值一致。在四态Potts模型中,我们观察到这些比值的系统尺寸依赖性中存在对数修正。

英文摘要:

The behavior of dimensionless quantities defined as ratios of partition functions is analyzed to investigate phase transitions and critical phenomena. At criticality, the universal values of these ratios can be predicted from conformal field theory (CFT) through the modular-invariant partition functions on a torus. We perform numerical calculations using the bond-weighted tensor renormalization group for three two-dimensional models belonging to different universality classes: the Ising model, the three-state Potts model, and the four-state Potts model. The partition-function ratios obey the same finite-size scaling form as the Binder parameter, and their critical values agree well with the universal values predicted by CFT. In the four-state Potts model, we observe logarithmic corrections in the system-size dependence of these ratios.

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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