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arXiv 1402.5972hep-thmath-phmath.MP
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NS-膜,源校正的Bianchi恒等式,以及更多关于非几何通量背景的内容

NS-branes, source corrected Bianchi identities, and more on backgrounds with non-geometric fluxes

David Andriot, Andre Betz

摘要:

本文的前半部分详细研究了NS-膜,包括NS 5-膜,Kaluza-Klein膜和奇异的$5_2^2$ -或Q-膜,以及NSNS(非)-几何通量的Bianchi恒等式。将四维Bianchi恒等式推广到10维非常数通量情形,并在NS膜存在的情况下,得到了源项的修正.后者允许他们减少到预期的泊松方程。没有源,我们的比安奇身份也恢复平方幂零$Spin(D,D) \times \mathbb{R}^+$狄拉克运营商。广义几何允许我们另外用通量来明确地表达运动方程。在后半部分中,我们在$β$ -超引力的背景下,对具有非几何通量的十维几何背景进行了一般分析。我们确定了一类定义明确的真空,在标准超引力中是非几何的:它们涉及$β$ -变换,$β$ -超引力与等距的明显对称性。我们还表明,这些真空属于一个几何T-对偶轨道。

英文摘要:

In the first half of the paper, we study in details NS-branes, including the NS5-brane, the Kaluza-Klein monopole and the exotic $5_2^2$- or Q-brane, together with Bianchi identities for NSNS (non)-geometric fluxes. Four-dimensional Bianchi identities are generalized to ten dimensions with non-constant fluxes, and get corrected by a source term in presence of an NS-brane. The latter allows them to reduce to the expected Poisson equation. Without sources, our Bianchi identities are also recovered by squaring a nilpotent $Spin(D,D) \times \mathbb{R}^+$ Dirac operator. Generalized Geometry allows us in addition to express the equations of motion explicitly in terms of fluxes. In the second half, we perform a general analysis of ten-dimensional geometric backgrounds with non-geometric fluxes, in the context of $β$-supergravity. We determine a well-defined class of such vacua, that are non-geometric in standard supergravity: they involve $β$-transforms, a manifest symmetry of $β$-supergravity with isometries. We show as well that these vacua belong to a geometric T-duality orbit.

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。

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