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arXiv 0809.4238hep-th
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Orientifolds和Orbifolds中的D-膜与Kasparov KK-理论

D-Branes in Orientifolds and Orbifolds and Kasparov KK-Theory

H. Garcia-Compean, W. Herrera-Suarez, B. A. Itza-Ortiz, O. Loaiza-Brito

摘要:

给出了IIB型Op^-定向折叠和轨道折叠中D-膜的实和等变KK-群分类。我们对与定向折叠平面相交的D-膜进行了分类,从中恢复了一些特殊的极限,作为I型Op^-定向折叠上的D-膜的谱和I型D-膜的双变分类。利用Clifford代数计算了相应的不稳定D膜系统中低能有效场论的规范群和变换性质。一些猜测存在的其他版本的KK-群,基于物理的见解,提出。在orbifold的情况下,一些已知的结果有关的D-膜相交orbifold的复制和推广。最后,恢复了这些轨道中不稳定系统的规范理论。

英文摘要:

A classification of D-branes in Type IIB Op^- orientifolds and orbifolds in terms of Real and equivariant KK-groups is given. We classify D-branes intersecting orientifold planes from which are recovered some special limits as the spectrum for D-branes on top of Type I Op^- orientifold and the bivariant classification of Type I D-branes. The gauge group and transformation properties of the low energy effective field theory living in the corresponding unstable D-brane system are computed by extensive use of Clifford algebras. Some speculations about the existence of other versions of KK-groups, based on physical insights, are proposed. In the orbifold case, some known results concerning D-branes intersecting orbifolds are reproduced and generalized. Finally, the gauge theory of unstable systems in these orbifolds is recovered.

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