标题： $\mathcal{N} = 2$轨道- S -折痕 显示英文标题

标题： $\mathcal{N} = 2$ Orbi-S-Folds

摘要： 我们通过结合S折叠和非微扰7-膜环绕轨道，引入了一类保留八个超电荷的IIB型弦理论的非紧背景，并研究了在$D3$-膜探测它们时低能出现的四维超共形场论。 我们在此设置与六维轨道瞬子理论的环面紧化带有Stiefel-Whitney扭曲之间建立了精确的对应关系，并利用此关系确定此类强耦合系统的主要特征，如中心电荷、Coulomb分支算符的谱、Higgs分支流的网络。 最后，为了更好地理解$\mathcal{N}=2$超共形场理论的景观，并可能将它们的分类扩展到二阶以上，我们提供了所有由我们的框架可访问的三阶理论的详细目录。 显示英文摘要

摘要： We introduce a new class of non-compact backgrounds of Type IIB string theory preserving eight supercharges by combining S-folds and non-perturbative 7-branes wrapping orbifolds, and study the four-dimensional superconformal field theories arising at low energy on $D3$-branes probing them. We draw a precise correspondence between this setup and the torus compactification of six-dimensional orbi-instanton theories with a Stiefel-Whitney twist, and use it to determine the main features of such strongly-coupled systems, like central charges, spectra of Coulomb-branch operators, networks of Higgs-branch flows. Finally, with the aim to improve our understanding of the landscape of $\mathcal{N}=2$ superconformal field theories, and possibly to extend their classification beyond rank two, we provide a detailed catalogue of all the rank-three theories that our framework gives access to.