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arXiv 0802.0723hep-th
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G2模空间的局部几何

Local geometry of the G2 moduli space

Sergey Grigorian, Shing-Tung Yau

摘要:

我们考虑由G2不变的3-形式$ϕ$定义的无挠G2结构的形变,并计算了$ϕ$的Hodge星在$ϕ$形变中的四阶展开.通过考虑G ~ 2流形上紧化的M-理论,使G ~ 2模空间自然复化,得到了G ~ 2上的一个Kahler度量,利用$ϕ$的Hodge星展开式,计算出了该度量的全曲率,并将其与Yukawa耦合联系起来.

英文摘要:

We consider deformations of torsion-free G2 structures, defined by the G2-invariant 3-form $ϕ$ and compute the expansion of the Hodge star of $ϕ$ to fourth order in the deformations of $ϕ$. By considering M-theory compactified on a G2 manifold, the G2 moduli space is naturally complexified, and we get a Kahler metric on it. Using the expansion of the Hodge star of $ϕ$ we work out the full curvature of this metric and relate it to the Yukawa coupling.

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