Gauge theory on Aloff–Wallach spaces

Gauge theory on Aloff–Wallach spaces
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Aloff-Wallach 空间的规范理论

DOI:
10.2140/gt.2019.23.685
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发表时间:
2016
影响因子:
2
通讯作者:
Gonçalo Oliveira
Gonçalo Oliveira
中科院分区:
数学1区
文献类型:
--
作者:
Gavin Ball;Gonçalo Oliveira

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对于规范群U(1)和SO(3),我们对Aloff-Wallach空间X_{k,l}$上的齐次余闭G2-结构的不变G2-瞬子进行了分类.因此,我们给出了一些例子,其中$G_2$-瞬子可以用来区分同一Aloff-Wallach空间上不同的严格几乎平行的$G_2$-结构。此外,我们还发现X_{1,1}$上严格近似平行的$G_2$-结构存在某些$G_2$-瞬子,而三Sasakian结构不存在这样的$G_2$-瞬子。作为进一步的分类结果,我们产生一些其他有趣的现象的例子,如:不可约的$G_2$-瞬子,作为结构的变化,合并成相同的可约和受阻的一个;和$G_2$-瞬子近平行的$G_2 $-流形不是局部能量最小化。
For gauge groups $U(1)$ and $SO(3)$ we classify invariant $G_2$-instantons for homogeneous coclosed $G_2$-structures on Aloff-Wallach spaces $X_{k,l}$. As a consequence, we give examples where $G_2$-instantons can be used to distinguish between different strictly nearly parallel $G_2$-structures on the same Aloff-Wallach space. In addition to this, we find that while certain $G_2$-instantons exist for the strictly nearly parallel $G_2$-structure on $X_{1,1}$, no such $G_2$-instantons exist for the tri-Sasakian one. As a further consequence of the classification, we produce examples of some other interesting phenomena, such as: irreducible $G_2$-instantons that, as the structure varies, merge into the same reducible and obstructed one; and $G_2$-instantons on nearly parallel $G_2$-manifolds that are not locally energy minimizing.
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DOI: 10.1007/jhep02(2011)088
发表时间: 2011
影响因子: 5.4
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