We shall present a SO(2) duality‐symmetric form of the linearized ADM action principleon anti de Sitter and Kasner backgrounds. The analysis is based on the two‐potential formalism, obtained upon resolution of the Hamiltonian constraints, and generalizes previous works that focused on Minkowski and de Sitter backgrounds.
Sergio Hörtner (Madrid): Gravitational duality near cosmological space‐times
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