Group actions on principal bundles and invariance conditions for gauge fields

Group actions on principal bundles and invariance conditions for gauge fields
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主丛的群作用和规范场的不变条件

DOI:
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发表时间:
1980
期刊:
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通讯作者:
L. Vinet
L. Vinet
中科院分区:
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文献类型:
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作者:
J. Harnad;S. Shnider;L. Vinet

文献摘要

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用主丛上的不变联系解释了光滑群作用下规范场的不变性条件。利用群同态给出了丛上的群作用的一个分类,并推广了Wang的不变联络分类定理,给出了丛上的群作用是投影到具有充分正则轨道结构的基流形上的作用的自同构.最后给出了紧化Minkowski空间的例子。
Invariance conditions for gauge fields under smooth group actions are interpreted in terms of invariant connections on principal bundles. A classification of group actions on bundles as automorphisms projecting to an action on a base manifold with a sufficiently regular orbit structure is given in terms of group homorphisms and a generalization of Wang’s theorem classifying invariant connections is derived. Illustrative examples on compactified Minkowski space are given.