论文标题
甚至光子传播器也必须打破保姆对称性
Even the photon propagator must break de Sitter symmetry
论文作者
论文摘要
除了精神量表，在DE Sitter空间中无质量矢量场的传播器无法维持DE Sitter的不变性，除非在横向尺度限制中除外。这是由于传播者必须满足的先前被忽视的沃德 - 塔卡哈西身份。在这里，我们构建了满足一致量化理论的所有条件的传播器。我们的解决方案保留了宇宙学的对称性和扩张，但破坏了空间特殊的保形转换。该解决方案等于在先前报道的传播运动方程式的先前报道的Sitter不变性解决方案中添加了均匀的DE Sitter Breaker术语。即使我们报告的校正与线性理论的仪表部门有关，但它们具有相关性，并且必须在包括相互作用时考虑到。
The propagator for the massless vector field in de Sitter space cannot maintain de Sitter invariance in the general covaraint gauge, except in the exactly transverse gauge limit. This is due to a previously overlooked Ward-Takahashi identity that the propagator must satisfy. Here we construct the propagator that satisfies all the conditions of a consistently quantized theory. Our solution preserves cosmological symmetries and dilations, but breaks spatial special conformal transformations. The solution amounts to adding a homogeneous de Sitter breaking term to previously reported de Sitter invariant solutions of the propagator equation of motion. Even though the corrections we report pertain to the gauge sector of the linear theory, they are relevant and have to be accounted for when interactions are included.
