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arXiv 2006.13399math.DGmath-phmath.MPmath.SG
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殆Hermitian 6-流形上的DT-瞬子方程

The DT-instanton equation on almost Hermitian 6-manifolds

Gavin Ball, Goncalo Oliveira

摘要:

本文研究一类偏微分方程,即DT-瞬子方程,其解可看作是Hermitian-Yang-Mills联络概念的推广.这些方程的名字归功于他们的希望,他们可能是有用的扩展DT-不变量的情况下辛6-流形。在这篇文章中,我们给出了非Kähler流形上的非阿贝尔和不可约DT-瞬子的第一个例子。这些构造的所有齐次几乎厄米特结构的流形上的满旗$\mathbb{C}^3$。连同存在的结果,我们得到一个非常明确的分类均匀DT-瞬子这样的结构。使用这种分类,我们能够观察到的现象,通过改变基本的几乎厄米特结构,一个不可约的DT-瞬子变得可约,然后消失。这是通过稳定壁的非凯勒类比,在弦理论中可以解释为内部规范场的超对称破缺。

英文摘要:

This article investigates a set of partial differential equations, the DT-instanton equations, whose solutions can be regarded as a generalization of the notion of Hermitian-Yang-Mills connections. These equations owe their name to the hope that they may be useful in extending the DT-invariant to the case of symplectic 6-manifolds. In this article, we give the first examples of non-Abelian and irreducible DT-instantons on non-Kähler manifolds. These are constructed for all homogeneous almost Hermitian structures on the manifold of full flags in $\mathbb{C}^3$. Together with the existence result we derive a very explicit classification of homogeneous DT-instantons for such structures. Using this classification we are able to observe phenomena where, by varying the underlying almost Hermitian structure, an irreducible DT-instanton becomes reducible and then disappears. This is a non-Kähler analogue of passing a stability wall, which in string theory can be interpreted as supersymmetry breaking by internal gauge fields.

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