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arXiv 1302.5577hep-th
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六维瞬子与扭子

Instantons in six dimensions and twistors

Tatiana A. Ivanova, Olaf Lechtenfeld, Alexander D. Popov, Maike Tormaehlen

摘要:

最近,六维空间的共形场论从二层的观点进行了讨论。特别地,证明了旋量空间上手征零静质量场与上同调类之间的旋量变换可以推广到四维到六维。另一方面,在扭量空间上推广瞬子规范场和全纯丛之间的对应关系的可能性是值得怀疑的。Saemann和Wolf证明了正则扭量空间Tw(X)上的全纯线丛(定义为六维流形X上几乎复结构的丛)对应于纯规范麦克斯韦势,即扭量变换失败。在X= CP ^3的例子中,我们证明了CP ^3上的阿贝尔或非阿贝尔杨-米尔斯瞬子与Tw(CP ^3)的复子流形上的全纯丛之间存在扭量对应,但它不像在四维情况下那么有效,因为扭量变换不像在四维情况下那样通过无约束的全纯数据来参数化瞬子。

英文摘要:

Recently, conformal field theories in six dimensions were discussed from the twistorial point of view. In particular, it was demonstrated that the twistor transform between chiral zero-rest-mass fields and cohomology classes on twistor space can be generalized from four to six dimensions. On the other hand, the possibility of generalizing the correspondence between instanton gauge fields and holomorphic bundles over twistor space is questionable. It was shown by Saemann and Wolf that holomorphic line bundles over the canonical twistor space Tw(X) (defined as a bundle of almost complex structures over the six-dimensional manifold X) correspond to pure-gauge Maxwell potentials, i.e. the twistor transform fails. On the example of X=CP^3 we show that there exists a twistor correspondence between Abelian or non-Abelian Yang-Mills instantons on CP^3 and holomorphic bundles over complex submanifolds of Tw(CP^3), but it is not so efficient as in the four-dimensional case because the twistor transform does not parametrize instantons by unconstrained holomorphic data as it does in four dimensions.

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