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arXiv 1911.09697hep-thmath.AG
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$(K3\times T^2)/\mathbb{Z}_3$上的杂种优势串及其对偶Calabi-Yau三重性

Heterotic strings on $(K3\times T^2)/\mathbb{Z}_3$ and their dual Calabi-Yau threefolds

Andreas Banlaki, Aradhita Chattopadhyaya, Abhiram Kidambi, Thorsten Schimannek, Maria Schimpf

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摘要：

本文研究了具有不同规范背景的$(K3\times T^2)/\mathbb{Z}_3$上的${\cal N}=2$杂化$E_8\times E_8$弦的紧化，计算了由单圈振幅引起的有效超引力作用量中的拓扑耦合.然后，我们确定候选人的对偶IIA型紧化的Calabi-Yau三倍，并比较杂种优势的结果与相应的拓扑弦振幅。我们发现对偶的Calabi-Yau几何是$K3$纤维化，它也是亏格为一的三段纤维化.此外，我们还证明了$K3$纤维化的极化晶格上的交叉形式必须是Narain晶格上的交叉形式的三倍$Γ^{1,1}$。

英文摘要：

In this paper we study compactifications of the ${\cal N}=2$ heterotic $E_8\times E_8$ string on $(K3\times T^2)/\mathbb{Z}_3$ with various gauge backgrounds and calculate the topological couplings in the effective supergravity action that arise from one-loop amplitudes. We then identify candidates for dual type IIA compactifications on Calabi-Yau threefolds and compare the heterotic results with the corresponding topological string amplitudes. We find that the dual Calabi-Yau geometries are $K3$ fibrations that are also genus one fibered with three-sections. Moreover, we show that the intersection form on the polarization lattice of the $K3$ fibration has to be three times the intersection form on the Narain lattice $Γ^{1,1}$.

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