Some effective methods (localization and topological vertex)for non-compact Calabi-Yau manifold are invalid for compact Calabi-Yau maniford.The string theory provide a effective approach to compute the Ooguri-Vafa invaraints,etc.. By using and extending all available methods from both the physics and mathematics, for generic compact Calabi-Yau threefords and systems of generic D-branes which stringy phenomenology are interested in: (1) computing the superpotentials of the open-closed topological strings,and studying the relevant gauge theory by using the quiver mehtod,etc.; (2) constructing the dual F-theory Calabi-Yau Four-folds and the dual heterotic string model, and probing its application to the stringy phenomenology; (3) studying the geometric invariants relevant to the superpotentials, in particule, the Ooguri-Vafa variants; (4) constructing the moduli space of Bridgeland stability conditions for the Brane Tiling, and studying the relevant properties from physical and mathematical viewponts.
对于非紧致的Calabi-Yau 流形,有较为有效的物理和数学计算方法(局部化和拓扑顶点等)。这些方法不适用于紧致的Calabi-Yau 流形,有的不变量的严格数学定义还没有很好地建立,弦理论提供了一个现实有效的途径。本项目将应用和扩展现有的各种物理和数学方法,对于物理唯象方面感兴趣的更一般的紧致Calabi-Yau 流形和D-膜系统: (1)计算开-闭拓扑弦理论的物理超势,运用Quiver 理论研究其相关的规范理论性质; (2)构造其F-理论对偶模型(Calabi-Yau Four-fold背景),以及带有特定规范对称群的对偶杂化弦模型,研究可能的唯像应用; (3)计算这些物理量所包含的几何不变量,如:Ooguri-Vafa 不变量等; (4)与Brane Tiling 有关的Bridgeland 稳定条件及其模空间,真空的相结构和稳定性、以及相变性质。
1.在有D膜的Ⅱ型弦理论中,拓扑障碍产生了由开闭弦模决定的有效理论的超势,超势也被定义为有效低能理论的F项,它决定了弦的真空结构. A模型上超势瞬子展开的系数对应着BPS态的数目,数学上它对应着Ooguri-Vafa不变量,它与Gromov-Witten不变量有着密切的联系并可以被解释为全纯圆盘的计数。 .利用GKZ系统的方法,我们可以计算一些Calabi-Yau流形的离壳超势与Ooguri-Vafa不变量,我们把这种方法推广到了non-Fermat型紧致Calabi-Yau流形与紧致的完全交Calabi-Yau流形(CICY)。更进一步的,我们研究了当不止存在一个D膜时系统的相结构。在多D膜系统中,我们发现了复杂的相结构:对于平行相,一般的,当D膜的个数为N时系统的超势满足Z_N对称性,并且他们都等于单个D膜的超势。然而,完全重合相与部分重合相 (N=3)的结果与单个D膜的结果并不一样。.接下来,我们打算更进一步的研究多个D膜系统的相结构,并将结果推广到含有多个D膜的non-Fermat型与紧致的完全交Calabi-Yau 流形。.2. 簇代数与量子群的研究;.3. 量子纠缠判断与局域区分性;.4. 量子非局域性研究。
{{i.achievement_title}}
数据更新时间:2023-05-31
Influencing factors of carbon emissions in transportation industry based on CD function and LMDI decomposition model: China as an example
特斯拉涡轮机运行性能研究综述
The Role of Osteokines in Sarcopenia: Therapeutic Directions and Application Prospects
Combining Spectral Unmixing and 3D/2D Dense Networks with Early-Exiting Strategy for Hyperspectral Image Classification
地震作用下岩羊村滑坡稳定性与失稳机制研究
拓扑弦关联函数和 F-理论势计算
超弦理论和拓扑量子场论
拓扑弦理论与低维流形的一些拓扑不变量
Type IIB 弦理论及F-理论紧致化和模型构建