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Fully non-linear gravitational wave simulations from past to future null-infinity

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arxiv 2504.02188 v1 pith:AXVVAGXT submitted 2025-04-03 gr-qc

Fully non-linear gravitational wave simulations from past to future null-infinity

classification gr-qc
keywords futuregravitationalnull-infinitypastbondifullynon-linearsimulations
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present the first numerical simulations of asymptotically flat space-times whose computational domain includes past and future null-infinity. As an application, we explore the scattering of a gravitational wave in a black hole space-time. The study is conducted in the fully non-linear regime using an initial boundary value problem formulation of Friedrich's generalised conformal field equations. We calculate the Bondi energy, Bondi news and gravitational information at both past and future null-infinity and discuss their relationships.

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