arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2010.04020hep-th
收藏

计算O(N)对称模型在NNLO上临界指数的导数展开

Derivative expansion for computing critical exponents of O(N) symmetric models at NNLO

Zoltán Péli

摘要:

我们将精确重整化群方程中有效作用量的导数展开应用到四阶以下的$d=3$欧几里德维的$Z_2$和$O(N)$对称标量模型。我们计算临界指数$ν$,$η$和$ω$在该领域使用多项式展开。我们得到我们的预测的指数采用两个监管机构广泛用于ERG计算。我们应用Wynn的迭代算法来改进临界指数的预测,外推到下一个到下一个到领先的阶预测的衍生物扩展。

英文摘要:

We apply the derivative expansion of the effective action in the exact renormalization group equation up to fourth order to the $Z_2$ and $O(N)$ symmetric scalar models in $d=3$ Euclidean dimensions. We compute the critical exponents $ν$, $η$ and $ω$ using polynomial expansion in the field. We obtain our predictions for the exponents employing two regulators widely used in ERG computations. We apply Wynn's epsilon algorithm to improve the predictions for the critical exponents, extrapolating beyond the next-to-next-to-leading order prediction of the derivative expansion.

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。

↑