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arXiv 2402.18531cond-mat.stat-mech
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临界性之外的相变:扩展 Ising 普适标度函数以描述整个相

Phase transitions beyond criticality: extending Ising universal scaling functions to describe entire phases

David Hathcock, James P. Sethna

AI总结:

该研究基于重整化群流范式理论扩展 Ising 普适标度函数,通过临界奇异性与低、高温展开构造覆盖全温度范围并指数收敛的近似。

摘要:

普适标度律仅在临界相变附近渐近适用。我们提出一种基于重整化群流范式理论的通用方案,用于纳入对标度的修正,从而定量描述所有相邻相。通过在临界点附近展开二维 Ising 模型的 Onsager 精确解,我们识别出一个特殊坐标,其收敛半径覆盖整个物理温度范围 $0<T<\infty$。在没有精确解的情况下,我们证明,仅利用临界奇异性以及低温和高温展开,就能在所有温度下对二维和三维 Ising 自由能以及三维磁化强度给出指数收敛的近似。我们讨论了未来工作的挑战与机遇。

英文摘要:

Universal scaling laws only apply asymptotically near critical phase transitions. We propose a general scheme, based on normal form theory of renormalization group flows, for incorporating corrections to scaling that quantitatively describe the entire neighboring phases. Expanding Onsager's exact solution of the 2D Ising model about the critical point, we identify a special coordinate with radius of convergence covering the entire physical temperature range, $0<T<\infty$. Without an exact solution, we demonstrate that using solely the critical singularity with low- and high-temperature expansions leads to exponentially converging approximations across all temperatures for both the 2D and 3D Ising free energies and the 3D magnetization. We discuss challenges and opportunities for future work.

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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