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hep-th2025
Reduction of topological invariants on null hypersurfaces
Jiang Long, Xin-Hao Zhou
Gravitational helicity flux density represents the angular distribution of helicity flux in general relativity. In this work, we explore its relationship to the reduction of topolo…
hep-th2025
Extrapolating the massive fields to future timelike infinity
Wen-Bin Liu, Jiang Long
It is well-known that future timelike infinity () in four-dimensional Minkowski spacetime is conformal to the unit three-dimensional hyperboloid (). We asymptotically exp…
hep-th2025
Thermal correlator at null infinity
Jiang Long, Hong-Yang Xiao
We study the thermal Carrollian correlators at null infinity in the real-time formalism. We derive the Feynman rules to calculate these correlators in the position space. We comput…