Seminarium Teorii Względności i Grawitacji

Hamiltonian charges, and their fluxes, of weak gravitational waves on a de Sitter background will be discussed. We compare the results with their counterparts for Maxwell theory and scalar field respectively. Used asymptotic conditions on the linearized metric have been modeled on the asymptotic behavior of the full solutions of the Einstein equations with positive cosmological constant. Considered space of solutions is greater than the solutions which fulfill so called Bondi asymptotic conditions. This is joint work with P. T. Chruściel.