论文标题
从O（4）Sigma模型中的扰动到非扰动
From perturbative to non-perturbative in the O(4) sigma model
论文作者
论文摘要
我们研究了磁场中二维O（4）Sigma模型的自由能的复出跨系列。利用集成性，我们获得了非常高阶的扰动数据，我们可以从中探索非扰动部门。我们能够准确地确定领先的实现指数级的小术语，我们根据精确积分方程的直接数值解决方案进行检查，并找到完全的一致性。
We study the resurgent trans-series for the free energy of the two-dimensional O(4) sigma model in a magnetic field. Exploiting integrability, we obtain very high-order perturbative data, from which we can explore non-perturbative sectors. We are able to determine exactly the leading real-valued exponentially small terms, which we check against the direct numerical solution of the exact integral equation, and find complete agreement.
