2024/12/20 by Sangmin Choi, Choi, Sangmin, Alok Laddha +3 · 4 citations
Computer Science · Engineering · Mathematics · #Advanced Measurement and Metrology Techniques #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Mathematics and Applications #Optical measurement and interference techniques
paper · doi:10.48550/arxiv.2412.16149
openalex publication_date 2024/12/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
The universality of the logarithmic soft photon theorem in four dimensions can be traced to an infinite-dimensional asymptotic symmetry which acts as a local phase rotation on matter as we have shown in 2403.13053. Here we extend our earlier results for the charges associated to these superphaserotations to all orders in the coupling and prove that their conservation is exactly the classical logarithmic soft photon theorem discovered by Saha, Sahoo and Sen in 1912.06413. We furthermore generalize the formulae for the associated electromagnetic displacement memory and its tail from particles to scalar matter fields. This completes the classical superphaserotation infrared triangle.