arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0812.4219hep-th
收藏

D-瞬子和扭子

D-instantons and twistors

Sergei Alexandrov, Boris Pioline, Frank Saueressig, Stefan Vandoren

摘要:

在Calabi-Yau三重空间上的II型弦紧化中,在超多重态模空间上寻找精确的、量子校正的度规是一个突出的公开问题。我们通过将超多重模空间上的四元数Kahler度量与其扭量空间上的复接触几何相关联来解决这个问题。在这个框架中,欧几里德D-膜瞬子被捕获的不同补丁之间的接触变换。我们通过重铸以前已知的A型D2-瞬子修正接触几何的语言,协变电磁对偶下的结果,并使用镜像对称。因此,我们能够简洁地将II型紧化中所有D-瞬子的效应表示为双对数函数之和。最后,我们对四维BPS黑洞的微观简并与Kontsevich和Soibelman的穿壁公式的关系,以及未知的NS 5膜瞬子贡献的形式作了一些评论。

英文摘要:

Finding the exact, quantum corrected metric on the hypermultiplet moduli space in Type II string compactifications on Calabi-Yau threefolds is an outstanding open problem. We address this issue by relating the quaternionic-Kahler metric on the hypermultiplet moduli space to the complex contact geometry on its twistor space. In this framework, Euclidean D-brane instantons are captured by contact transformations between different patches. We derive those by recasting the previously known A-type D2-instanton corrections in the language of contact geometry, covariantizing the result under electro-magnetic duality, and using mirror symmetry. As a result, we are able to express the effects of all D-instantons in Type II compactifications concisely as a sum of dilogarithm functions. We conclude with some comments on the relation to microscopic degeneracies of four-dimensional BPS black holes and to the wall-crossing formula of Kontsevich and Soibelman, and on the form of the yet unknown NS5-brane instanton contributions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑