三圈阶下Yang-Lee边奇点的动态临界指数
Dynamic critical exponent of the Yang--Lee edge singularity at three loops
- Saint Petersburg State University(圣彼得堡国立大学)
- Joint Institute for Nuclear Research(杜布纳联合核研究所)
- Petersburg Nuclear Physics Institute named by B.P.Konstantinov of NRC “Kurchatov Institute”(俄罗斯国家研究中心库尔恰托夫研究所鲍·波·康斯坦丁诺夫彼得堡核物理研究所)
机构由 AI 辅助整理,请以论文原文为准。
AI总结:
该研究采用微扰重整化群方法结合多种积分技术,计算出三圈阶下Yang-Lee边奇点的动态临界指数z,结果与此前相关计算一致。
AI中文摘要:
我们采用微扰重整化群方法计算弛豫动力学中Yang-Lee边奇点的动态临界指数z,精度达三圈阶。该计算结合图归约、含超对数的参数积分实现的两圈解析求值,以及采用 Sector Decomposition 方法的三圈积分数值求值。所得微扰级数用Padé和Padé-Borel-Leroy方法重求和,得到不同空间维数下的z估计值,结果与此前的微扰及泛函重整化群计算一致。
英文摘要:
We compute the dynamic critical exponent $z$ of the Yang--Lee edge singularity in relaxational dynamics using perturbative renormalization-group methods to the three-loop order. The calculation combines diagram reduction, analytic two-loop evaluation via parametric integration with hyperlogarithms, and numerical evaluation of three-loop integrals using the Sector Decomposition method. The perturbative series obtained is resummed using Padé and Padé-Borel-Leroy methods to produce estimates of $z$ in various spatial dimensions. The resulting values are consistent with previous perturbative and functional renormalization-group calculations.