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hep-th2026
Gravitational multipoles, antipodal matching relations, and the logarithmic soft graviton theorem
Geoffrey Compère, Dima Fontaine, Wen-Bin Liu +1
We derive the classical logarithmic soft graviton theorem for the scattering of massive particles in four-dimensional asymptotically flat spacetime using a position-space analysis…
hep-th2026
Covariant variation and its applications
Wen-Bin Liu, Jiang Long
We define a covariant variation of tensor fields by combining its Lie derivative with the metric variation. This operator preserves the metric, contractions, and Hodge duality, but…