We define symmetries in non-relativistic quantum electrodynamics, which have the physical interpretation of rotation, parity, and time reversal symmetry. We collect transformation properties related to these symmetries in Fock space representation as well as in the Schrödinger representation. As an application, we generalize and improve theorems about Kramers’ degeneracy in non-relativistic quantum electrodynamics.

中文翻译：

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非相对论量子电动力学中的对称性

我们在非相对论量子电动力学中定义对称性，它具有旋转、宇称和时间反转对称性的物理解释。我们在福克空间表示以及薛定谔表示中收集与这些对称性相关的变换属性。作为一个应用，我们推广并改进了非相对论量子电动力学中克拉默简并性的定理。