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arXiv 2111.04719cond-mat.stat-mech
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用五圈$ε$展开法计算二维和三维伊辛模型的动力学临界指数$z$

The dynamic critical exponent $z$ for 2d and 3d Ising models from five-loop $ε$ expansion

L. Ts. Adzhemyan, D. A. Evdokimov, M. Hnatič, E. V. Ivanova, M. V. Kompaniets, A. Kudlis, D. V. Zakharov

摘要:

通过对单组分模型A进行最小减五圈$\varepsilon$展开,计算了二维和三维Ising普适类的动力学临界指数$z$.这一突破原来是可能的,通过成功地适应部门分解技术的关键动力学的问题。所获得的第五微扰的顺序伴随着使用先进的再确认技术的渐近级数,使我们能够找到高度准确的数值估计$z$:对于二维和三维的情况下,我们分别获得$\boldsymbol{2.14(2)}$和$\boldsymbol{2.0235(8)}$。发现的数字是在最近的结果,使用不同的方法得到很好的一致性。

英文摘要:

We calculate the dynamic critical exponent $z$ for 2d and 3d Ising universality classes by means of minimally subtracted five-loop $\varepsilon$ expansion obtained for the one-component model A. This breakthrough turns out to be possible through the successful adaptation of the Sector Decomposition technique to the problems of critical dynamics. The obtained fifth perturbative order accompanied by the use of advanced resummation techniques for asymptotic series allows us to find highly accurate numerical estimates of $z$: for two- and three-dimensional cases we obtain $\boldsymbol{2.14(2)}$ and $\boldsymbol{2.0235(8)}$ respectively. The numbers found are in good agreement with recent results obtained using different approaches.

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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