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hep-th2021★ 1 cited
Conformal Wavefunctions for Graviton Amplitudes
Chang Liu, David A. Lowe
The extended-BMS algebra of asymptotically flat spacetime contains an SO(3,1) subgroup that acts by conformal transformations on the celestial sphere. It is of interest to study th…
hep-th2021★ 6 cited
Conformal Wave Expansions for Flat Space Amplitudes
Chang Liu, David A. Lowe
The extended BMS algebra contains a conformal subgroup that acts on the celestial sphere as SO(3,1). It is of interest to perform mode expansions of free fields in Minkowski spacet…