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arXiv 0705.4098hep-thmath.AG
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开拓扑弦中的扩展全纯Anomaly与圈振幅

Extended Holomorphic Anomaly and Loop Amplitudes in Open Topological String

Johannes Walcher

摘要:

紧卡-丘三重上的开拓扑弦振幅满足Bershadsky,Cecotti,Ooguri和Vafa的全纯反常方程的推广.为了满足蝌蚪相消,D-膜组态的总拓扑荷必须为零。这样的D膜的边界状态是全纯捕获的霍奇理论正常功能。它的格里菲思无穷小不变量是闭弦汤川耦合的类似物,并且在具有D-膜的拓扑弦的费曼图展开中扮演终结者的角色。对于实五次曲线上具有代表性的低亏格且边界较少的世界片,求解了全纯反常方程,确定了全纯模糊性。

英文摘要:

Open topological string amplitudes on compact Calabi-Yau threefolds are shown to satisfy an extension of the holomorphic anomaly equation of Bershadsky, Cecotti, Ooguri and Vafa. The total topological charge of the D-brane configuration must vanish in order to satisfy tadpole cancellation. The boundary state of such D-branes is holomorphically captured by a Hodge theoretic normal function. Its Griffiths' infinitesimal invariant is the analogue of the closed string Yukawa coupling and plays the role of the terminator in a Feynman diagram expansion for the topological string with D-branes. The holomorphic anomaly equation is solved and the holomorphic ambiguity is fixed for some representative worldsheets of low genus and with few boundaries on the real quintic.

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