标题： Lavelle-McMullan变换在量子电动力学中是否是一种全新的对称性？ 显示英文标题

标题： Is Lavelle-McMullan transformation a really new symmetry in QED?

摘要： 考察了量子电动力学（QED）的Lavelle-McMullan对称性在经典和量子水平上的性质。结果显示，通过检查Ward-Takahashi恒等式，Lavelle-McMullan对称性并未在QED中给出任何新的非平凡信息。受Ward-Takahashi恒等式检验的启发，我们构建了QED的广义非局域和非协变对称性。 显示英文摘要

摘要： Lavelle-McMullan symmetry of QED is examined at classical and quantum levels. It is shown that Lavelle-McMullan symmetry does not give any new non-trivial information in QED by examining the Ward-Takahashi identities. Being inspired by the examination of Ward-Takahashi identity, we construct the generalized non-local and non-covariant symmetries of QED.