报告题目：Orientifold Calabi-Yau threefolds: divisor exchanges and reflections

报告人：高昕 教授 （四川大学）

报告时间：2024年5月16日（周四）下午15:30-16:30

报告地点：北洋园校区49教410室

报告摘要：

We systematically constructed orientifold Calabi-Yau threefolds, encompassing both divisor exchange and multiple divisor reflection involutions. Expanding our classification, we reached h^{1,1}(X)=12 using a database from the Kreuzer-Skarke list. We identified 156,509 proper divisor exchange involutions, and explored over 1 billion reflection types. Under these involutions, we clarified some ambiguities in determining fix locus in the literature and improve our algorithm to make the process much efficient. New type of Z2 free action on the Calabi-Yau was found. Moreover, in O3/O7-system orientifold Calabi-Yau threefolds, we investigated "naive orientifold Type IIB string vacua" by considering D3 tadpole cancellation. The smoothness and Hodge numbers splitting of those orientifold Calabi-Yau threefold was also determined.

报告人简介：

高昕，博士，2008年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，期间在德国马克斯-普朗克物理研究所博士联合培养。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，研究方向为弦论唯象，计算代数几何，全息有效场论。