This talk based on recent paper arXiv: 2407.02565 [hep-th], where using the Kreuzer-Skarke database of 4-dimensional reflexive polytopes, we systematically constructed a new database of orientifold Calabi-Yau threefolds with h^{1,1}(X)≤12. Our approach involved non-trivial Z2 involutions, incorporating both divisor exchanges and multi-divisor reflections acting on the Calabi-Yau threefolds. Each proper involution results in an orientifold Calabi-Yau threefolds and we constructed 320,386,067 such examples. We developed a novel algorithm that significantly reduces the complexity of determining all the fixed loci under the involutions, and clarifies the types of O-planes. Our results show that under proper involutions, the majority of cases end up with O3/O7-plane systems, and most of these further admit a naive Type IIB string vacua. Additionally, a new type of free action was determined. We also computed the smoothness and the splitting of Hodge numbers in the Z2-orbifold limit for these orientifold Calabi-Yau threefolds.

报告人简介

本科毕业于北京师范大学，2014年于中国科学院理论物理研究所获得博士学位。此后分别在美国弗吉尼亚理工大学，意大利INFN/罗马第二大学，德国海德堡大学从事博士后科学研究工作。曾获意大利国家核物理研究所理论物理博士后研究奖金，德国洪堡学者研究奖金。现在四川大学物理学院任教，研究方向为弦论及其唯象，计算代数几何，全息有效场论等。

邀请人

李田军 研究员