发表机构
New Cornerstone Laboratory, Institute of Theoretical Physics, Chinese Academy of Sciences; Institute of Physics, University of Amsterdam（新基石实验室，中国科学院理论物理研究所; 阿姆斯特丹大学物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出德西特空间中标量QED全重数波函数系数的紧凑公式，结合低点系数与总能量项，利用Ward恒等式推导递推关系，并验证共形对称性。
AI 中文摘要
我们提出了四维德西特空间中标量 QED 的树级晚期波函数系数的紧凑全重数公式，该公式涉及共形耦合的带电标量对和正螺旋度光子。它将移位标量动量处的低点系数与正比于总能量的旋量-螺旋度项相结合。平坦空间振幅在存在两个或更多光子时为零，但德西特系数保持非零。这些零点强制了总能量留数的抵消，并通过因式分解，强制了涉及多光子子振幅的适当部分能量留数的抵消。利用公共参考构造，我们从阿贝尔 Ward 恒等式推导出精确的低点递推关系。共形对称性提供了独立检验：配分和满足非齐次 Ward 恒等式，而总能量项是齐次解。我们还概述了无质量费米子 QED 中的类似递推关系。
英文摘要
We present a compact all-multiplicity formula for tree-level late-time wavefunction coefficients of scalar QED in four-dimensional de Sitter space, with a conformally coupled charged scalar pair and positive-helicity photons. It combines lower-point coefficients at shifted scalar momenta with a spinor-helicity term proportional to the total energy. The flat-space amplitudes vanish for two or more photons, yet the de Sitter coefficients remain nonzero. These zeros enforce cancellations of the total-energy residue and, through factorization, of proper partial-energy residues involving multi-photon subamplitudes. Using a common-reference construction, we derive an exact lower-point recursion from Abelian Ward identities. Conformal symmetry provides an independent check: the partition sum solves the inhomogeneous Ward identity, while the total-energy term is a homogeneous solution. We also outline an analogous recursion in massless fermionic QED.
Comments5 pages,
